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Transit Signal Priority
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Book Synopsis Transit Signal Priority Project, Phase II by : Hesham Rakha
Download or read book Transit Signal Priority Project, Phase II written by Hesham Rakha and published by . This book was released on 2006 with total page 42 pages. Available in PDF, EPUB and Kindle. Book excerpt: Transit Signal Priority (TSP) is recognized as an emerging technology that is capable of enhancing traditional transit services. Basic green-extension TSP was implemented on U.S. Route 1 in the Northern Virginia Area (or Washington, DC metropolitan area). This study quantifies the impact of TSP technology on transit-vehicle performance using field-collected Global Positioning System (GPS) data and evaluates the system-wide benefits of TSP operations using computer simulations to expand on the field evaluation study. The field study demonstrated that overall travel-time improvements in the order of 3% to 6% were observed for TSP-operated buses. However, the results also demonstrated that green-extension TSP can increase transit-vehicle travel times by approximately 2.5% during congested morning peak periods. In addition, the study demonstrated that TSP strategies reduce transit-vehicle intersection delay by as much as 23%. The field study demonstrated that the benefits associated with TSP were highly dependent on the roadway level of congestion and were maximized under moderate to low levels of congestion. However, the simulation results indicated that TSP did not result in statistically significant changes in auto or system-wide travel times (differences less than 1%). Furthermore, a paired t-test concluded that basic green-extension TSP did not increase side-street queue lengths. An increase in the traffic demand along Route 1 resulted in increased system-wide detriments; however, these detriments were minimal (less than 1.37%). The study demonstrated that an increase in side-street demand did not result in any statistically significant system-wide detriments. Increasing the frequency of transit vehicles resulted in additional benefits to transit vehicles (savings in transit vehicle travel times by up to 3.42%), but no system-wide benefits were observed. Finally, TSP operations at near-side bus stops (within the detection zone) resulted in increased delays in the range of 2.85%, while TSP operations at mid-block and far-side bus stops resulted in network-wide savings in delay in the range of 1.62%. Consequently, we recommend not implementing TSP in the vicinity of near-side stops that are located within the TSP detection zone. The simulation results indicated that a TSP system generally benefits transit vehicles, but does not guarantee system-wide benefits. In this study, a maximum transit vehicle travel-time savings of 3% to 6% was observed with the provision of green-extension TSP from both the field and simulation evaluation studies. However, the green-extension TSP operation did not benefit nor damage the non-transit vehicles in most cases. Also, it should be noted that the results of the study may be specific to Route 1 corridor because of the unique characteristics of the study corridor, the specific traffic demand, and TSP logic implemented. Finally, the study recommends the calibration of current TSP settings to improve the effectiveness of TSP operation. Also, different transit priority strategies or a combination of other TSP strategies should be investigated to increase the benefits of TSP operations. A conditional TSP system that only provides priority to transit vehicles behind schedule and an intelligent transit monitoring system are also recommended to improve the TSP system on the Route 1 corridor.
Book Synopsis Design and Implementation of Transit Priority at Signalized Intersections by : Canadian Urban Transit Association
Download or read book Design and Implementation of Transit Priority at Signalized Intersections written by Canadian Urban Transit Association and published by . This book was released on 2000 with total page 81 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Transit Signal Priority by : Paul Anderson
Download or read book Transit Signal Priority written by Paul Anderson and published by . This book was released on 2020 with total page 10 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Toward Deployment of Adaptive Transit Signal Priority Systems by : Meng Li (Writer on traffic signs and signals)
Download or read book Toward Deployment of Adaptive Transit Signal Priority Systems written by Meng Li (Writer on traffic signs and signals) and published by . This book was released on 2008 with total page 166 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Transit Signal Priority written by and published by . This book was released on 2020 with total page 118 pages. Available in PDF, EPUB and Kindle. Book excerpt: Public transit buses face many operational challenges—especially when operating on the same streets and roads as other vehicles. Buses can be slowed by traffic congestion and get repeatedly caught at traffic lights, slowing buses down and delaying both passengers on board and passengers waiting at stops farther along the route. The TRB Transit Cooperative Research Program's TCRP Synthesis 149: Transit Signal Priority: Current State of the Practice documents the current practice of TSP, which is an important tool that increases bus speeds and reliability, thereby improving transit system efficiency and effectiveness. Twenty-eight (61%) of the 46 surveyed transit agencies had active TSP deployments, and 13 transit agencies (28%) either are in predeployment testing or have plans to pursue TSP in the future.
Book Synopsis Transit Signal Priority Evaluation by Micro-Simulation by : Faisal Mahmud
Download or read book Transit Signal Priority Evaluation by Micro-Simulation written by Faisal Mahmud and published by LAP Lambert Academic Publishing. This book was released on 2011-03 with total page 120 pages. Available in PDF, EPUB and Kindle. Book excerpt: Transit Signal Priority is an operational strategy that eases the movement of transit vehicles such as buses, light rail or streetcars, through traffic-signal controlled intersections. The benefits of TSP operations include better schedule adherence and improved transit travel times with minimal impact to normal traffic operations. In this book, a portion of the new Tide Light Rail Transit (LRT) system in Norfolk, Virginia, USA is modeled and evaluated. In order to model and evaluate the TSP operations, a micro-simulation model for the network is created in VISSIM. By using the Ring Barrier Controller (RBC) emulator within VISSIM, the control logic for TSP and No TSP scenarios is created.The analysis and context of the book is helpful to the professionals and students, especially those in the field of urban planning and transportation engineering, or anyone else who may be considering utilizing TSP logic for learning and research efforts. As the book contains in detail experimental results analyses as well as real life field scenario implementation, it will be a drafting tool to gaining knowledge about transit signal priority.
Book Synopsis Models and Technologies for Smart, Sustainable and Safe Transportation Systems by : Stefano de Luca
Download or read book Models and Technologies for Smart, Sustainable and Safe Transportation Systems written by Stefano de Luca and published by BoD – Books on Demand. This book was released on 2021-07-28 with total page 268 pages. Available in PDF, EPUB and Kindle. Book excerpt: Innovative and smart mobility systems are expected to make transportation systems more sustainable, inclusive, and safe. Because of changing mobility paradigms, transport planning and design require different methodological approaches. Over twelve chapters, this book examines and analyzes Mobility as a Service (MaaS), travel behavior, traffic control, intelligent transportation system design, electric, connected, and automated vehicles, and much more.
Book Synopsis Comprehensive Evaluation of Transit Signal Priority System Impacts Using Field Observed Traffic Data by :
Download or read book Comprehensive Evaluation of Transit Signal Priority System Impacts Using Field Observed Traffic Data written by and published by . This book was released on 2008 with total page 108 pages. Available in PDF, EPUB and Kindle. Book excerpt: To improve the level of service for Community Transit (CT) buses, the South Snohomish Regional Transit Signal Priority (SS-RTSP) project was launched. To understand the overall benefit of this project, the SS-RTSP system was tested and evaluated after the hardware and software had been installed on the 164th Street SW corridor (Phase One) and the SR 99 corridor (Phase Two) in Snohomish County, Washington State. In this study, impacts of the SS-RTSP system on both transit and local traffic operations were quantitatively evaluated on the basis of field-observed data. Simulation models were also built and calibrated to compute measures of effectiveness that could not be obtained from field-observed data. With simulation models and field observed data, the impacts of the SS-RTSP system on both transit and local traffic operations were quantitatively evaluated. Our evaluation results showed that the SS-RTSP system provided remarkable benefits to transit vehicles, with insignificant negative impacts to local traffic on cross-streets under the current coordinated control strategy. The overall impact of the SS-RTSP system on local traffic at each entire intersection was not statistically significant at the p=0.05 level. To improve the performance of the current SS-RTSP system, more transit vehicles can be made TSP eligible. The average number of granted TSP trips was only 16.96 per day per intersection during the Phase One test and 14.40 during Phase Two test. Given that negative impacts of the SS-RTSP project on local traffic were not significant, more transit trips can be granted with proper TSP treatment to generate more benefits from the SS-RTSP system. Further simulation-based investigations on TSP system operations and optimization were conducted. The research findings indicated that to achieve the best operation efficiency, the compatibility between TSP control schemes and signal control coordination should be strengthened to minimize transit disruption to signal coordination. TSP systems must be fully tested under different coordinated control plans prior to implementation.
Author :National Association of City Transportation Officials Publisher :Island Press ISBN 13 :1610917472 Total Pages :236 pages Book Rating :4.6/5 (19 download)
Book Synopsis Transit Street Design Guide by : National Association of City Transportation Officials
Download or read book Transit Street Design Guide written by National Association of City Transportation Officials and published by Island Press. This book was released on 2016-04-14 with total page 236 pages. Available in PDF, EPUB and Kindle. Book excerpt: "The Transit Street Design Guide sets a new vision for how cities can harness the immense potential of transit to create active and efficient streets in neighborhoods and downtowns alike. Building on the Urban Street Design Guide and Urban Bikeway Design Guide, the Transit Street Design Guide details how reliable public transportation depends on a commitment to transit at every level of design. Developed through a new peer network of NACTO members and transit agency partners, the Guide provides street transportation departments, transit operating agencies, leaders, and practitioners with the tools to actively prioritize transit on the street."--Site Web de NACTO.
Book Synopsis Applications of Transit Signal Priority Technology for Transit Service by : Frank Anthony Consoli
Download or read book Applications of Transit Signal Priority Technology for Transit Service written by Frank Anthony Consoli and published by . This book was released on 2014 with total page 216 pages. Available in PDF, EPUB and Kindle. Book excerpt: This research demonstrated the effectiveness of Transit Signal Priority (TSP) in improving bus corridor travel time in a simulated environment using real world data. TSP is a technology that provides preferential treatment to buses at signalized intersections. By considering different scenarios of activating bus signal priority when a bus is 3 or 5 minutes behind schedule, it was demonstrated that bus travel times improved significantly while there is little effect on delays for crossing street traffic. The case of providing signal priority for buses unconditionally resulted in significant crossing street delays for some signalized intersections with only minor improvement to bus travel time over both scenarios of Conditional priority. Evaluation was conducted by using micro-simulation and statistical analysis to compare Unconditional and Conditional TSP with the No TSP scenario. This evaluation looked at performance metrics (for buses and all vehicles) including average speed profiles, average travel times, average number of stops, and crossing street delay. Different Conditional TSP scenarios of activating TSP when a bus is 3 or 5 minutes behind schedule were considered. The simulation demonstrated that Conditional TSP significantly improved bus travel times with little effect on crossing street delays. The results also showed that utilizing TSP technology reduced the environmental emissions in the I-Drive corridor. Furthermore, field data was used to calculate actual passenger travel time savings and benefit cost ratio (7.92) that resulted from implementing conditional TSP. Conditional TSP 3 minutes behind schedule was determined to be the most beneficial and practical TSP scenario for real world implementation at both the corridor and regional levels.
Book Synopsis Assess Impacts and Benefits of Traffic Signal Priority for Buses by : Janice Daniel
Download or read book Assess Impacts and Benefits of Traffic Signal Priority for Buses written by Janice Daniel and published by . This book was released on 2004 with total page 224 pages. Available in PDF, EPUB and Kindle. Book excerpt: Although signal priority has proven to be an effective tool for reducing delays to buses, this technique is not always beneficial to the overall traffic network. Providing priority for transit vehicles along a corridor with a large number of transit vehicles can cause a coordinated network to be out of step resulting in an overall increase in delay. Bus signal priority also has the disadvantage of penalizing the cross-street traffic when high transit volumes exist at the corridor. The objectives of the research described in this report is to assess the impacts of and the implementation issues associated with the use of bus signal priority in New Jersey and to assess the benefit and costs of signal priority.
Book Synopsis Transit Signal Priority Strategies by : Ahmad Alrashidan
Download or read book Transit Signal Priority Strategies written by Ahmad Alrashidan and published by . This book was released on 2018 with total page 492 pages. Available in PDF, EPUB and Kindle. Book excerpt: A Transit Signal Priority (TSP) system's fundamental job is to give priority to transit vehicles enabling faster passage through signalized intersections. Through a system that responds to transit vehicles approaching an intersection, green phase extension or red truncation is granted to minimize transit travel time. With emerging technologies TSP has the potential of doing so without disturbing general traffic flows. In this dissertation, an evaluation of the overall state of practice for TSP is conducted to upgrade the quality of TSP. Certain parameters were found to be significant in TSP performance, like: transit occupancies, transit arrival times, traffic volume, network capacity, system quality and green time. These multiple parameters affecting TSP performance from various studies are gathered and tested in three different cases: 1) Isolated intersection, 2) Main corridor with cross-streets and 3) Case study: Austin downtown network. This study focused on developing different TSP response scenarios to test what is the best way to handle bus requests. These scenarios represent the three TSP system types: passive, active and adaptive. By creating multiple scenarios, the goal is to develop technology that will minimize bus delays while also minimizing effects on general traffic delays.
Book Synopsis Transit Signal Priority (TSP) by : Harriet R. Smith
Download or read book Transit Signal Priority (TSP) written by Harriet R. Smith and published by . This book was released on 2005 with total page 200 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis An Overview of Transit Signal Priority by :
Download or read book An Overview of Transit Signal Priority written by and published by . This book was released on 2004 with total page 27 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Toolkit Case Study written by and published by . This book was released on 2012 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Transit Signal Priority with Connected Vehicle Technology by : Byungkyu Park
Download or read book Transit Signal Priority with Connected Vehicle Technology written by Byungkyu Park and published by . This book was released on 2014 with total page 22 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis An overview of transit signal priority, final draft by :
Download or read book An overview of transit signal priority, final draft written by and published by . This book was released on 2002 with total page 25 pages. Available in PDF, EPUB and Kindle. Book excerpt:
