Leading Pedestrian Interval (LPI)
Cross first. An LPI gives people walking a 3–7 second head start before cars get a green light.
What is it?
A Leading Pedestrian Interval is a signal timing feature that lets people begin crossing the street before drivers are allowed to move. The walk signal turns on early so people become more visible in the crosswalk.
How to Use It
- Wait for the WALK signal to appear before stepping into the street.
- Begin crossing as soon as WALK appears—this is your "head start".
- Stay alert for turning vehicles and make eye contact when possible.
Why It Matters
LPIs reduce crashes by making people in the crosswalk easier for drivers to see. Giving people a few extra seconds to enter the street before cars move improves visibility, lowers turning conflicts, and increases safety for everyone.
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33%
Fewer Injuries
Intersections with a 7-second LPI saw 33% fewer pedestrian injuries compared to non-LPI intersections.
Source: Columbia University
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58.7%
Crash Reduction
A before-after study found LPIs led to a 58.7% reduction in pedestrian–vehicle crashes at treated intersections.
Source: Fayish & Gross, Transportation Research Record (2010)
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42%
Fewer Near-Misses
Video analysis from Bellevue, WA showed a 42% decrease in high-risk pedestrian–vehicle conflicts after LPIs were installed.