Signal Timing Applications

Usage: Wide

Traffic signals are essential tools to manage user right-of-way, reduce conflicts, and reduce delay at intersections and along corridors. Signal timing refers to how those signals are programmed and coordinated with other nearby traffic signals.  With over 13,500 signalized intersections in the City, timing plans are tailored to balance the needs of all users and, where needed, prioritize pedestrian and cyclist safety, and transit.   

3rd Avenue, Manhattan
8th Avenue and W 48th Street, Manhattan

Benefits

  • Promotes safety by clarifying right-of-way and reducing conflicts among users
  • Supports walking, micromobility, and accessibility by reducing crossing times and using leading pedestrian intervals (LPIs) to give non-motorized users a head start
  • Minimizes delays across all modes
  • Enables prioritization of buses through signal priority systems
  • Enhances traffic flow along corridors through coordinated signal timing
     

Considerations

  • Signal timing strategies should align with DOT’s Goals and Principles, Vision Zero, and NYC Streets Plan goals
  • Streets with higher volumes or transit service may receive a greater share of green time within each cycle
  • Shorter cycle lengths reduce overall delay but may limit flexibility for longer crossings or complex phasing
  • Coordinated signals along a corridor help reduce stops and improve consistency for all users
     

Application

All signalized intersections, but particularly at:

  • Intersections with long pedestrian crossings or complex phasing needs
  • Locations with high pedestrian or cyclist activity
  • Corridors with high ridership bus routes
     

Design

  • DOT determines signal timing, phasing, cycle lengths, and coordination parameters (i.e., offsets)
  • Implement Leading Pedestrian Intervals (LPIs) where feasible. LPIs support walking, micromobility, and accessibility by reducing crossing times and giving pedestrians and cyclists a head start before vehicles are given the green light to turn
  • Transit Signal Priority (TSP) should be considered for bus corridors. TSP enables buses to move more efficiently, reducing travel times for transit riders
  • Coordinated signal timing can be used to provide a "green wave" reducing the amount of stopping and starting for cyclists, buses and other motor vehicles, and improving their signal compliance. It also minimizes delays for drivers, resulting in a reduction of speeding while moving traffic more efficiently 
  • Accessible Pedestrian Signals are required at intersections
  • For more information on federal standards for traffic control devices, visit the MUTCD
↑