A Leading Pedestrian Interval (LPI) is a timing option used at signalized intersections to activate the pedestrian walk signal before the adjacent (parallel) vehicle signal, providing a head start to pedestrians wishing to cross. This head start gives an advantage to the pedestrian over vehicles turning at the intersection and can help improve driver yielding behavior. The LPI allows pedestrians to establish their presence within the crosswalk, making them more visible to drivers.
LPIs are most effective at signalized intersections where there is a significant amount of turning traffic, especially left turns, travelling over a crosswalk. Signalized “T” intersections would be priority candidate locations since all traffic exiting the side street would be turning across the main street crosswalks. Consideration is also given to locations where turning traffic encounters limited or no opposing through traffic (i.e. intersections with one-way streets), near schools or seniors’ facilities or where collision history indicates a pattern of vehicle/pedestrian collisions associated with turning traffic.
All Traffic Control Locations are available on Open Data. The presence of Leading Pedestrian Intervals is included as an attribute within this data.
Each year staff review and assess new locations for the addition of leading pedestrian intervals.