Multi-Modal Intelligent Traffic Signal Systems (MMITSS) Impacts Assessment

The study evaluates the potential network-wide impacts of the Multi-Modal Intelligent Transportation Signal System (MMITSS) based on a field data analysis utilizing data collected from a MMITSS prototype and a simulation analysis. The Intelligent Traffic Signal System (I-SIG), Transit Signal Priority (TSP), Freight Signal Priority (FSP), and the combination of TSP and FSP applications were evaluated. MMITSS seeks to improve mobility through signalized corridors using advanced communications and data to facilitate the efficient travel of passenger vehicles, pedestrians, transit, freight, and emergency vehicles through the system. The field data analysis demonstrated that MMITSS applications effectively improved the travel time and the delay of the equipped vehicles. In particular, FSP reduced the delay of connected trucks by up to 20% and I-SIG improved travel time reliability by up to 56%, compared to the base case. The simulation study found that I-SIG achieved vehicle delay reductions up to 35% and TSP effectively saved travel time for both transit and passenger vehicles on the corridor where TSP was operated; but occasionally increased the system-wide delay, due to reduced green times on the side streets. FSP simulation results indicated that FSP successfully reduced travel times for connected trucks, but also increased system-wide delay, due to increased delays on side streets. The simulation study found that the combination of TSP and FSP applications was effective in assigning priority to trucks based on a pre-defined hierarchy of control. The study concludes that the MMITSS I-SIG, TSP, FSP, and the combination of TSP and FSP applications improve vehicle travel time, delay, and travel time reliability for equipped passenger cars, trucks, and transit vehicles on the test facility, but the tradeoff is that it may produce overall system-wide negative impacts.

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• Record URL:
  https://rosap.ntl.bts.gov/view/dot/3557
• Corporate Authors:

  Virginia Tech Transportation Institute

  Blacksburg, VA  United States 

  Federal Highway Administration

  ITS Joint Program Office
  1200 New Jersey Avenue, SE
  Washington, DC  United States  20590
• Authors:
  • Ahn, Kyoungho
  • Rakha, Hesham
  • Hale, David K
• Publication Date: 2015-8-19

Language

• English

Media Info

• Media Type: Digital/other
• Edition: Final Report
• Features: Appendices; Figures; Maps; Photos; References; Tables;
• Pagination: 82p

Subject/Index Terms

• TRT Terms: Data analysis; Evaluation and assessment; Intelligent transportation systems; Mobile communication systems; Mobility; Multimodal transportation; Simulation; Traffic delays; Traffic signal control systems; Traffic signal priority; Travel time
• Subject Areas: Highways; Motor Carriers; Operations and Traffic Management; Public Transportation; I73: Traffic Control;

Filing Info

• Accession Number: 01584090
• Record Type: Publication
• Report/Paper Numbers: FHWA-JPO-15-238
• Contract Numbers: DTFH61-12-D-00020, Task 13-012
• Files: NTL, TRIS, ATRI, USDOT
• Created Date: Dec 28 2015 1:47PM