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Home My WebLink AboutResolution - 2015-R0023 - Neighborhood Traffic Management Program - 01/08/2015Resolution No. 2015-80023 Item No. 5.9 January 8, 2015 RESOLUTION BE IT RESOLVED BY THE CITY COUNCIL OF THE CITY OF LUBBOCK: WHEREAS, citizens in Lubbock regularly request traffic control measures in residential neighborhoods throughout Lubbock to address problems related to traffic volume, vehicle speed, roadway geometry, and vehicle / pedestrian conflicts. WHEREAS, the Traffic Engineering Department is responsible for encouraging neighborhood involvement as part of the solution to traffic related problems. WHEREAS, in order to address the neighborhood traffic concerns regularly raised by citizens, the City Traffic Engineering Department has developed a Neighborhood Traffic Management Program. WHEREAS, adoption of the Neighborhood Traffic Management Program is recommended by Citizens Traffic Commission. NOW THEREFORE, BE IT RESOLVED THAT the Neighborhood Traffic Management Program is hereby approved by the City Council for implementation by the City Traffic Engineering Department. The City Traffic Engineer shall retain the authority to revise or modify these guidelines and procedures as necessary and these guidelines shall not be deemed to limit the authority of the Traffic Engineering Department to remedy problems on their own initiative. Said Neighborhood Traffic Management Program is attached hereto and incorporated in this Resolution as if fully set forth herein and shall be included in the minutes of the Council. Passed by the City Council this 8th day of January 015. GLEIKe HAE SON, MAYOR ATTEST: RIFbe ca Garza, City Secretary APPROVED AS TO CONTENT: tel) YT -Ir tyl " Sharmon Owens, Director of Traffic Engineering APPROVED AS �� of Tmmc Calming Plaa2015.doca � T City Of Lubb o c �i{f};As NEIGHBORHOOD TRAFFIC MANAGEMENT PROGRAM DRAFTS December 2013 July 2014 October 2014 Traffic Engineering 915 Avenue) Lubbock, Texas 79401 806-775-2132 11. Neighborhood Traffic Issues.................................................................................................. 5 Speeding.................................................................................................................................. 5 CutThrough Traffic ................................................................................................................ 6 Parking..................................................................................................................................... 6 Collisions................................................................................................................................. 6 III. Program Eligibility....................................................................... EligibleStreets.............................................................................. Elibible Alleys............................................................................... Other Considerations Before Installing Traffic Calming Devices IV. Process................................................................................................................................. 10 Steps...................................................................................................................................... 10 Funding.................................................................................................................................. 10 Removal and Alteration......................................................................................................... 10 V 11 VI. Traffic Calming Devices...................................................................................................... 12 fk-bbock 12 Effectiveness of Traffic Calming Devices............................................................................ NolghWWO Trani, Management Program Traffic Calming Device Toolbox for Alleys......................................................................... nttaber ZOA Traffic Calming Device Toolbox For Residential Streets ..................................................... TABLE OF CONTENTS I. Introduction............................................................................................................................ 3 Authorityand Scope................................................................................................................ 3 Overview................................................................................................................................. 3 Goalsof the Program............................................................................................................... 3 Strategies................................................................................................................................. 3 11. Neighborhood Traffic Issues.................................................................................................. 5 Speeding.................................................................................................................................. 5 CutThrough Traffic ................................................................................................................ 6 Parking..................................................................................................................................... 6 Collisions................................................................................................................................. 6 III. Program Eligibility....................................................................... EligibleStreets.............................................................................. Elibible Alleys............................................................................... Other Considerations Before Installing Traffic Calming Devices IV. Process................................................................................................................................. 10 Steps...................................................................................................................................... 10 Funding.................................................................................................................................. 10 Removal and Alteration......................................................................................................... 10 V 11 VI. Traffic Calming Devices...................................................................................................... 12 Definition............................................................................................................................... 12 Effectiveness of Traffic Calming Devices............................................................................ 12 Traffic Calming Device Toolbox for Alleys......................................................................... 13 Traffic Calming Device Toolbox For Residential Streets ..................................................... 14 Traffic Calming Device Toolbox for Collector Streets and Thoroughfares .................. _..... 16 APPENDIX A: Application for Traffic Calming......................................................................... 20 APPENDIX B: Traffic Calming Treatment Plan.......................................................................... 21 APPENDIX C: Traffic Calming Survey Petition........................................................................ 22 11I r„��, 'Lubbock ut I. INTRODUCTION AUTHORITYAND SCOPE Neighborhood Traffic Management Program October 2014 These guidelines and procedures are issued under the authority of the City Traffic Engineer and recommended by Citizens Traffic Commission and City Council. The City Traffic Engineer retains the authority to revise or modify these guidelines and procedures as necessary. These guidelines shall not be deemed to limit the authority of the Traffic Engineering Department to remedy problems on their own initiative. OVERVIEW The Neighborhood Traffic Management Program (NTMP) was created to address citizen requests for traffic control measures in residential neighborhoods throughout Lubbock. These problems are often related to traffic volume, vehicle speed, roadway geometry, and vehicle / pedestrian conflicts. The Traffic Engineering Department receives requests each year from residents dealing with traffic related issues, and these issues generally fall into four categories: 1. Vehicles exceeding the legal speed limit 2. Cut—through traffic 3. Parked can impeding tmffic flow 4. Occurrence of accidents or"near accidents" CMFAZUa1f N.14917067ITr7 is Identify the roles of the neighborhood residents and the Traffic Engineering Department in addressing traffic related issues in neighborhoods. • Encourage neighborhood involvement as part of the solution to traffic related problems. • Discuss advantages / disadvantages of potential solutions for traffic problems. STRATEGIES The following strategies are recommended by the Institute of Traffic Engineers (ITE) for handling traffic concerns such as speeding, cut -through traffic, site restrictions cause by parking and collisions: Enforcing general laws and ordinances pertaining to speed limits, intersection control, and parking regulations. Educating residents to better understand the causes of traffic problems, potential solutions to those problems, and the advantages / disadvantages of implementing these solutions. Installing Traffic Control Devicesl that provide specific regulatory, warning, or guide messages to motorists judiciously and in conformance with the Texas Manual on Uniform Traffic Control Devices (TMUTCD) which provides standards, guidance, and options for traffic control devices on public roadways. 'Traffic Control Devices are beyond the scope of this program. Information about these devices can be found on the Traffic Engineering Department's website at bn r/hmffiac' lubbock tx us/allServ'ccs as n. fLubbeock Ndghborbaotl T. lr Management Program Onober2014 4. Installing Traffic Calming Devices that manage the physical movement of vehicles or pedestrians within the roadway or within a neighborhood when the fust three strategies have proven insufficient or ineffective. f40. .,ot Lubbock SPEEDING Neighborhood Traale Management Program Otlabor 3014 II. NEIGHBORHOOD TRAFFIC ISSUES By Texas motor vehicle law and City ordinance, the prima facie speed limit on City streets is 30 mph unless a specific ordinance designates a different speed limit. By City ordinance, the speed limit in public alleys is 5 mph. The Texas Department of Transportation (TxDOT) sets speed limits on state -maintained roads within the City. The City of Lubbock generally does not install speed limit signs on residential streets for three reasons: 1. Most drivers are aware of State Law 2. 30 mph provision signs can detract from the aesthetic appeal of a neighborhood 3. Overuse of speed limit signs limits their usefulness DETERMINING THE PROPER SPEED LIMIT When a municipality needs to raise the 30 MPH prima facie speed, the engineers use guidance from professional manuals to determine the appropriate speed. Generally, only speed limits on non-residential streets are increased from the prima facie speed. According to the Texas Manual on Uniform Traffic Control Devices (TMUTCD), the following factors are typically considered in an engineering investigation to determine the proper speed limit: • Road surface characteristics, shoulder condition, grade (degree of inclination of the roadway), and alignment • Sight distance (Length of the roadway ahead visible to the driver) • The 85th percentile speed (Speed at which 85% of the traffic is traveling at or below) and pace speed • Roadside development and culture • Roadside friction (Density of the development adjacent to the roadway that generates traffic affecting traffic flow on the roadway) • Safe speed for curves or hazardous locations within the zone • Parking practices and pedestrian activity • Reported accidents in a recent 12 -month period SPEED STUDY The Traffic Engineering Department can determine the speed on a street by conducting a speed study that is in accordance with established engineering practices and guidelines. Typically, when the 85th -percentile speed is more than 5 mph over the legal speed limit, the residential street is identified for remedial action, and the following steps generally need to take place before any traffic calming measures can be implemented: I. Request enforcement by City police department. 2. Dynamic speed limit signs displaying the speed of each approaching vehicle installed temporarily on site as self -enforcement. 3. Additional signage, such as speed limit or warning signs, or pavement markings installed. 4. Traffic Engineering Department consultation with neighborhood representatives to determine if the installation of traffic calming devices is appropriate for the area. id Lubbock CUT THROUGH TRAFFIC Neighborhood Tnalc Management Program Omober2014 During peak hour traffic or when construction is present on arterial or collector streets, drivers may use neighborhood streets as an alternate route. To counter cut through traffic, Traffic Engineers can adjust signal timing. Signs to restrict cut through traffic do not generally affect driver behavior; therefore, engineers do not normally sign to limit this issue. PARKING Neighborhood streets carry local traffic to residences. Parking is allowed in neighborhoods unless Restricted Parking or Resident Only Parking has been pursued, granted and funded by residents on one side of a city block. Where neighborhood schools exist, parking issues at drop off and pick up times can cause reduced visibility for drivers or access issues for emergency vehicles. If parking becomes problematic, parking restrictions can be requested by the school district, emergency services or residents adjacent to the school. COLLISIONS When Traffic Engineering is advised that collisions are an issue, the department investigates by visiting the site and gathering crash data. Depending on the existing tmffic control and the data, corrective measures may be available to solve the issue. 411 it, as m 1* ubboek Neighborhood Traffic Management Program October 3014 III. PROGRAM ELIGIBILITY Requests for traffic calming devices will be considered when certain criteria are met, funding is available and a majority of the residents (home -owners) in the neighborhood support the installation of traffic calming devices. ELIGIBLE STREETS This program is based on the desire to manage neighborhood traffic issues. To determine if a neighborhood street will be considered for a traffic calming measure, the street must: • Be paved and constructed on dedicated right-of-way. • Be adjacent to property that is either wholly or primarily residential. • Not be adjacent to open space, parks, public school grounds, etc. where "drive around" problems are likely • Not be scheduled to be repaired or reconstructed within the next two years. • Not be designated as a primary emergency response route by the Public Safety Departments. • Not be designated as an arterial (Major roadway mainly serving through traffic; takes traffic to and from expressways and freeways; provides access to adjacent properties.) • Not be designated as a collector roadway. (Roadway that collects and distributes local traffic to and from arterial streets, and provides access to adjacent properties within a neighborhood.) • Collector streets that are primarily residential, where residences face the collector street, are eligible for `residential' traffic calming measures. ELIGIBLE ALLEYS Alleys that meet the criteria listed above shall also meet one of the following volume and speed criteria to be eligible for alley speed bump installation: • The alley has a minimum average daily traffic of 150 vehicles per day; or • The 85th percentile speed of vehicles traveling on the alley exceeds the speed limit by 5 mph. (The speed limit in residential alleys is 5 mph, unless otherwise indicated.) NOTE: In order to maintain the drainage in or alley, the only current traffic calming device offered is a speed bump. Residential streets which will not be expanded beyond one lane of traffic int each direction may be considered for traffic calming under this program. OTHER CONSIDERATIONS BEFORE INSTALLING TRAFFIC CALMING DEVICES The following factors should be considered and discussed with the neighborhood representatives prior to the installation of any traffic calming device: IMPAR ON OTHER ROADWAY USERS Traffic calming actions can often have unintended negative safety impacts on certain roadway users. Depending on the device, they can result in worsening the situation for a range of roadway users such bicyclists, pedestrians, and parked cars. 'Lubbock Neighborhood Traffic Management Program October 2030 SIGHT STOPPING DISTANCE The distance required by a driver of a vehicle, traveling at a given speed, to bring the vehicle to a stop after an object on the roadway becomes visible. Traffic calming devices will be designed so that the stopping sight distance is not reduced. ACCIDENTS Collisions are not expected to increase after the installation of any traffic calming device. However, driver inattentiveness or distraction could cause the driver to collide with or drive too fast through the traffic calming device, which could produce a collision. VEHICULAR SPEED AND VOLUME Vehicle speed is expected to conform to the ordinance speed, 30 MPH, with the use of traffic calming devices; although some drivers may speed up between traffic calming devices. Volume of vehicles is expected to stay constant; however, some drivers may find another route that does not use traffic calming devices. STREETS AND ALLEYS AFFECTED BY DIVERTED TRAFFIC Another concern is that in many instances implementing traffic calming devices will likely move the problem rather than solve the problem. In most instances, the placing of impediments on a particular neighborhood street may merely divert some or all of that traffic to other neighborhood streets. In these cases, a neighborhood -wide approach may have to be taken. DRAINAGE Device must not cause an existing drainage problem to worsen or create a new drainage problem. GRADE Roadway grade must be less than 6%. Some devices cannot be installed on steep streets or alleys. EMERGENCY RESPONSE Traffic calming measures may be effective because they physically control traffic; however, they may have a negative impact on several classes of emergency vehicles. The City, as well as its residents and businesses, place a very high priority on minimizing emergency response times. Installation of most physical traffic calming tools can significantly worsen emergency response time. This is especially true for fire apparatus and ambulances. Because of the heavy weight of fire engines and the delicate instruments and patients within ambulances, these vehicles must almost come to a complete stop when they encounter a bump, dip or sharp curve. Creating bumps, dips and sharp curves is often precisely the objective being sought by many of the traffic calming tools. While these maneuvers will cause moderate discomfort and delay for normal passenger vehicles, they cause a much greater problem for emergency response vehicles. The City's Fire Department is concerned about the affect these devices could have on response times and will have an initial review of all proposed changes with the ability to veto any changes affecting critical access streets. ADJACENT RESIDENCE CONCURRENCE Device shall be located adjacent to or within 100 feet, as measured along the right-of-way, of a property owner that approves the placement of the device. LOCATION OF DEVICES Device will be approximately 20 feet from the nearest driveway or intersecting alley segment and 100 feet of an intersecting street. Spacing will be determined by Traffic Engineering. Lubbock n... Neighborhood Traffic Management Program October 2014 STREET ALIGNMENT Device cannot be installed in locations where horizontal or vertical curves could cause a vehicle traveling at a prudent speed to lose control when traversing the device. NOISE IMPACTS The noise impact to adjacent residents resulting from vehicles braking, going over and around some types of traffic calming devices can have a major impact on the acceptability of these devices by residents living close to them. The unanimous support of residents living immediately adjacent to locations where physical changes are proposed will be essential to the success of any project. PARKING It is often necessary to prohibit on-street parking in the immediate vicinity of the intersection in order to accommodate the realigned vehicle path. There are also significant on-street parking impacts from several options and the adjacent residents should be aware that a loss of on-street parking in front of their residence will occur. VISUAL IMPACTS AND AESTHETIC CONCERNS While some traffic calming devices can have favorable aesthetic impacts, others can be, by their nature, unsightly. Devices such as speed bumps and diverters must often pose no opportunity for the incorporation of aesthetics and can actually have negative visual impacts. Virtually all major traffic calming actions require reflective devices, signs and striping which may negatively affect the aesthetics of a neighborhood. MAINTENANCE Street maintenance costs will increase in two areas. Landscaping associated with such devices as traffic circles, chokers, neck-downs, and slow points will require regular maintenance. Devices such as speed bumps may have to be reinstalled each time a residential street is overlaid. ►r airor Lubbock Neighborhood Tame Management Program IV. PROCESS To assure that traffic calming requests are processed consistently, fairly and timely, the subsequent steps will be followed. STEPS Neighborhood representative submits application fort. Traffic Engineering performs a site visit and investigation within six weeks of application. Neighborhood Representative works with TE to establish Traffic Calming Treatment Plan and acquire citizen information for Survey Petition. Signatures will be verified to confirm the required neighborhood support level. If verified Survey Petition does not show 80% support, application is denied. If verified Survey Petition shows 80% or moresupport, go to step 6. Traffic Engineering Department will place the street or alley on a list of approved traffic calming projects, and the neighborhood representative will be advised of the approved installation request. 11611 U710t] When the installation of a traffic calming device is appropriate to address a traffic issue, it will be the responsibility of the City to dedicate funding for the project. The cost for each traffic calming device will be established based on the actual current cost for a typical installation, including any necessary pavement markings and/or signs (see Chapter VI Traffic Calming Devices). If a traffic calming device is not deemed necessary by the Traffic Engineering Department after completion of a transportation engineering study, but it is still desired by the neighborhood, it may be installed at the neighborhood's expense. Traffic Engineering will develop the installation and issue an invoice to the neighborhood, by and through the neighborhood's designated representative. If full payment has not been received within 6 months from the invoice date, the street or alley will be removed from the list of approved projects. If this occurs, it will be necessary to repeat the entire approval process. The cost of the transportation engineering studies and maintenance of the traffic calming device is the responsibility of the City, excluding any landscaping. Landscaping will be the responsibility of the neighborhood. REMOVAL AND ALTERATION The process for the removal or alteration of traffic control devices is the same as the process for installation. Traffic control devices must remain in place for a minimum of one year before the removal process can begin. 10 Lubb°oek Neighborhood Traffic Management Program anaheaota V. SURVEY PETITION Upon completion of the site review and investigation, Traffic Engineering staff will review the findings of the study with neighborhood representatives. If remedial action is recommended, neighborhood volunteers will assist the Traffic Engineering Department in solving traffic problems within their area. If streets or alleys are to be physically altered by a traffic calming project, neighborhood representative(s) will pass out a survey petition prepared by the Traffic Engineering Department. This survey petition must be distributed and completed by all potentially affected residents to determine the level of support for the proposal and returned to the Traflic Engineering Department for review. The survey area includes houses: • Whose front, rear, or side yard adjoins the street or alley segment in which a proposed device would be located • That are located on adjacent streets or alleys on which traffic maybe diverted if the proposed traffic calming device is installed NOTE: Traffic Engineering a ill dctermine the required survey area. The Traffic Calming Treatment Plan (Appendix B) will include • A brief description of the request • Traffic Engineering comments and concerns • Devices under consideration • Proposed locations • Potential advantages and disadvantages of the device • Funding required from the neighborhood • Instructions to the residents • An nerial map showing each house affected NOTE., Trak Engineering will prepare the required Traffic Calming Treatment Plan with input from the neighborhood representative. A minimum of 80% support of homes within a specified survey area must be achieved in order to demonstrate the required degree of resident support. Up to three (3) months will be permitted for the collection of necessary signatures and survey submission to the City. If the necessary number of signatures is not collected within this time period, a new survey must be completed. I1 Lubbock Ne1yhburhoo0 Tmalc ManaQcment tram eRuberber 2014 VI. TRAFFIC CALMING DEVICES Before the City decides to pursue traffic calming options, it is important that the impacts of the traffic calming devices be carefully considered. While these options can be successful, they can also result in problems more significant than the original concern. This chapter describes the possible impacts of traffic calming measures. In most instances, the benefits are quite obvious and predictable, while the disadvantages can be much more unexpected. Consequently, a greater emphasis has been placed on the potential problems so that decisions can be made in a more fully informed manner. DEFINITION Traffic Calming Devices are physical measures that alter driver behavior and improve conditions for the non -motorized street users. These devices are intended to be self -enforcing and designed to not inflict damage to passing vehicles or cause drivers to lose control of their vehicles if they are driving at a reasonable speed for the conditions. EFFECTIVENESS OF TRAFFIC CALMING DEVICES Physical actions such as the installation of speed bumps, speed cushions, traffic circles, medians, etc. are almost always successful in forcing traffic to behave in an intended fashion. There are significant potential long-range benefits to utilizing traffic calming measures. 12 TLubb'ock Neighborhood Traffic Management Program October 20 14 TRAFFIC CALMING DEVICE TOOLBOX FOR ALLEYS SPEED BUMP Approximate Cast: $1,00041,500 Rounded raised area of pavement (or rubber devices) that are placed in pairs across alleys, typically 300-600 feet apart. An advance warning sign with advisory plaque of 5 MPH approaching each device will be installed. t Advantages.•__. Figure 1. Rubber Speed Bump • Can reduce speed • Can enhance the alley environment for non -motorists • No effect on non -emergency access • Easy to install and remove • Pre -constructed from preformed recycled rubber with a tapered edge near curb to allow gap for drainage Disadvantages: • Possible increase in traffic noise from braking and acceleration of vehicles • Speeds might increase midway between speed bumps • Aesthetics of speed bumps and associated signs and markings • Emergency vehicle response times 13 I" avor Lubbock Neighborhood Traffic Management Program 0dober2014 TRAFFIC CALMING DEVICE TOOLBOX FOR RESIDENTIAL STREETS SPEED CUSHION Approximate Cost $1,00041,500 Rounded, raised area of pavement (or rubber device) placed across the roadway, generally 10 to 14 feet long (in the direction of travel). Often installed in a series and are spaced between 300 — 600 feet apart. Advantages: • Slows traffic more gradually than speed bumps • Can also be effective in reducing traffic volume • Relatively inexpensive • Relatively easy for bicycles to cross Disadvantages: Figure 2. Asphall Speed Curhloalfuhle • Drivers may slow before the speed hump and accelerate between speed humps producing more acceleration noise • May impact transit, emergency services, and sanitation routes and may also require mitigation for drainage • Drivers wanting to avoid streets with speed cushions often divert to streets less capable of dealing with higher volumes of cars SPEED TABLE Approximate Cost: $3,00044,000 Rounded, raised area of pavement placed across the roadway, generally 10 to 14 feet long (in the direction of travel) with a Flat section in the middle Advantages: • Same as Speed Cushions • Can be installed on a local or collector street at the mid -block or at the intersection to facilitate pedestrian crossing Disadvantages: • Same as Speed Cushions 14 'M ��et Lubbock RAISED INTERSECTION Approximate Cost: $50,0004/00,000 Flat raised areas covering entire intersections, with ramps on all approaches and often with brick or other textured materials on the Flat section and ramps. Often part of an area wide traffic calming scheme involving both intersecting streets. Typically rise to sidewalk level Advantages: • Makes intersection more pedestrian -friendly • No effect on access. Neighborhood Tralne Management Program Oaaber2014 Figure 3. Raised Intersection Disadvantages: • May impact transit, emergency services, and sanitation routes • May require mitigation for drainage • Expensive to construct TRAFFIC CIRCLE Approximate Cos! $70,000450,000 c �•"� �` Raised islands, placed in intersections, around which �. traffic circulates. Motorists yield to motorists already in the intersection and require drivers to slow to a speed that allows them to comfortably maneuver - 1st •J around the intersection. - - - Advantages: • Effective at reducing speed — • Can be used on both local and collector•Pi�-. streets Figure 4. 'traffic Circle • Can improve safety • Can have a positive aesthetic value • Can discourage cut -through traffic • Enhances the street environment for non -motorists • Landscaping plays two important roles, making the circle more attractive to the neighborhood residents and changing the character of the street to make it less appealing for high speed driving • No effect on private property access Disadvantages: • Can be difficult for large vehicles or emergency vehicles to navigate • Must be designed in such a manner as to not encroach on crosswalks • Landscaping needs to be designed to allow adequate sight distance 15 Lubbock Neighborhood Tragic Management Program ORober 2014 TRAFFIC CALMING DEVICE TOOLBOX FOR COLLECTOR STREETS AND THOROUGHFARES Traffic Calming Devices such as median barriers and road closures will need City Council approval. MEDIAN BARRIER Approximate Cost $5,000-$20.000 Median barriers are islands located along the centerline of a street and continue through an intersection to block traffic at a cross street. The median narrows the traffic flow and serves as a channel to slow traffic. Advantages: • May result in a reduction of speed and traffic noise. Disadvantages: • No reduction in traffic volume • Will not inherently improve safety • Will require maintenance • Limits on -street parking, bicycle lanes, and driveway access • Utilities may require some level of relocation • Not proven to reduce traffic speed TRAFFIC FOOTBALL Approximate Cost: $5,0004/0,000 Traffic footballs are raised curvilinear medians in the roadway that require drivers to steer around the curves Advantages: • Can slow traffic on collector streets by guiding traffic Disadvantages: Figure 5. Median Barrier • Creates a curvature in the roadway Figure 6. Traffic Football • May have an adverse impact on bicycle lanes and on -street parking • Emergency vehicle response times could potentially be increased • May require the relocation of curb, gutter, and sidewalk 16 AkIft, !FUub�o'�'k, CHOKER Approximate Cost: $5,000420, 000 Cankers are formed as islands extending from the existing curb line of the street. One-way choker is a barrier on either side of a local street that "channels" traffic at certain points, while a two-way choker allows traffic; in both directions. A bulb -out is essentially a choker at an intersection. Advantages: Neighborhood Traffle Management Program Oct.bier 2014 • May reduce uniffic speed, volume and noise Figure 7. One-way Choker • Reduces pedestrian crossings width • Increases visibility of pedestrians • Does not significantly restrict emergency vehicle access (except for large firc trucks making right turns) Disadvantages: • Relies on regulatory signs and driver courtesy to function properly • May result in new problematic traffic patterns • May restrict access to driv.w.y� • Utilities may require relocation • May result in drainage problems • Potential obstacle for motorists • May not result in a marked reduction in Figure 8. Two-way Choker traffic speed or noise • May require the loss of bicycle lanes • The speed reduction of the two-way choker may diminish as drivers become accustomed to its presence CHICANES Approximate Cost: $50,000-$75,000 Chicanes are series of curb extensions that alternate from one side of the street to the other forming S- shaped curves. Apprapriate for mid -block locations only, and typically is used as a series of at least three. Advantages: • Reduces traffic speed and noise I ._�k: • May also reduce traffic volume Figure 9. Chicanes • Would restrict "straight through" movement of traffic • No effect on access 17 VI cky Lubbock Disadvantages: Nclgbbarh..d T,. lc Mamgemeat Program ORobcr2014 • May still permit speeding by drivers cutting straight paths across the center line • Street sweeping may need to be done manually • Can impact parking and driveway access • With no other traffic present, drivers would be able to accelerate through the chicane which may result in increased travel speed and acceleration noise • Loses its effectiveness when a low volume of traffic is present • May result in drainage problems DIVERTER/HALF CLOSURE. Approximate Cost: $20,0004 _"°-n. "!.�-..-`7 Physical barriers installed at intersections that restrict motor vehicle movements in selected directions. Cut—through traffic, or other provisions should be made to allow bicyclists and pedestrians access across the closure. Diagonal diverters restrict straight—through traffic movements, while right -tum (one approach) and Star diverters (all approaches) may prevent straight -through traffic from proceeding through the intersection. Advantages: • Can be installed within the existing intersection • May reduce traffic volume • Restricts through traffic • Conflicts are reduced • Pedestrian safety is increased Disadvantages: Figure 10. Diagonal Diverter/II:d r Clneu rC • Travel time and distance increased for all users • Local residents will be diverted to other streets and will be inconvenienced in gaining access to their properties • Visitors and delivery services often confused and delayed • Emergency vehicle response times could potentially be increased • Would change local traffic circulation patterns • Ineffective if implemented in places where traffic can use driveways to bypass the diverter • May redirect traffic to low volume streets causing additional impact to residents 18 Lubbock FULL STREET CLOSURE (CUL DE SAC) Approximate Cost: $50,000 Neighborhood Traffic Management Program Odober 2014 Barriers placed across a street to completely close the street to through -traffic, usually leaving only the sidewalk open. Closures are typically applied only after other measures have failed or been determined to be inappropriate. Barriers may consist of landscaped islands, walls, gales, side-by-side bollards, or any other obstruction that leave an opening smaller than the width of a passenger car. Advantages: • Effectively blocks cut -through traffic • Reduces traffic speeds • Reduces traffic volumes • Improves traffic safety Disadvantages: • Legal issues associated with closing a public street. • Transit, emergency service, and sanitation routes may also be impacted by prohibiting through traffic. • Maintenance of the landscaped area • Loss of on -street parking • Inconvenience for local residents who are forced to drive longer routes to/from their Figure 11. Street ('Insure homes • Speed reduction occurs only on the street that is closed • High cost of implementation • May impact utilities and access • Would require approval from the fire and sanitation departments as it impacts access 19 11I .yar Lubbock t ut Neighborhood Train, Management Program October 2014 VII. APPENDIX A: APPLICATION FOR TRAFFIC CALMING PROJECT NAME: Roadway Segment: From: To: Description of perceived traffic issue: Designated Contact Person- Neighborhood Representative: Email Address: Phone: ENGINEERING INVESTIGATION Roadway Classification Residential: Collector: Thomughfare:Other: Speed Limit: Daily Traffic Volume (vehicles per day): 85" Percentile Speed (MPH): Percent Speed over 5 MPH (% of vehicles): Collisions in last twelve months: Eligibility Criteria Met (pg. 6): Emergency Services Comments: Roadway Segment Approved(Denied: Neighborhood Representative contacted (date): 20 '„� OVN Lubbock nelgbborbooa Tramc Management Program Ortobor 2014 VIII. APPENDIX B: TRAFFIC CALMING TREATMENT PLAN PROJECT NAME: Roadway Segment: From: To: Designated Contact Person -Neighborhood Representative: Email Address: Proposed Traffic Calming Brief Description of Request: Comments/Concems: Devices Under Consideration: Proposed Advantages/Disadvantages of the Funding Required By Neighborhood: Instructions To Attach map/aerial of all houses and adjacent streets which may be affected by Traffic Calming Treatment, 21 Lubbock Ne16M1horM1ood Tmale Management Program October 11114 IX. APPENDIX C: TRAFFIC CALMING SURVEY PETITION PROJECT NAME: Designated Contact Person- Neighborhood Representative: Email Address: Attachment: Traffic Calming Treatment Plan Submit original survey petition and attachment to: Traffic Engineering, PO Box 2000, 915 Avenue J, Lubbock, TX, 79457, 806-775-2132 We, the undersigned, petition that our neighborhood be part of the Neighborhood Traffic Management Program. We understand that the neighborhood may be responsible for any costs associated with the installation of any traffic calming devices. We also understand that traffic calming devices on one street may cause traffic to re-route and utilize adjacent streets. All persons signing this petition do hereby certify that they own a residence within the area impacted by the proposed traffic calming device as shown on the attached Traffic Calming Treatment Plan and map. Print Name Signature Street Address Owner? y or N Phone Mark an x In APPllrahl colae e. n Vermes (date) 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 22 1►p a„a Lubbock Nelghborhood Traffic Management Program OeInM1v I.I I 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 23