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St. Louis City Pedestrians Finally Getting A ‘Leading Pedestrian Interval’

December 3, 2018 Featured, Walkability No Comments

A significant change has been happening at St. Louis intersections: the leading pedestrian interval (LPI). The what?

Walk signal is on while the traffic signal is still red, 11th @ Locust.

A leading pedestrian interval (LPI) gives pedestrians the opportunity to enter an intersection 3-7 seconds before vehicles are given a green indication. With this head start, pedestrians can better establish their presence in the crosswalk before vehicles have priority to turn left. LPIs provide the following benefits:

  • Increased visibility of crossing pedestrians.
  • Reduced conflicts between pedestrians and vehicles.
  • Increased likelihood of motorists yielding to pedestrians.
  • Enhanced safety for pedestrians who may be slower to start into the intersection. (Federal Highway Administration)

The FHA says the benefit is a 60% “Reduction in pedestrian-vehicle crashes at intersections.” Video I took last month shows a 3-second LPI. Hopefully busier intersections (pedestrians & cars) get 7 second LPIs. Still. 3 seconds is better than 0!

I’m not sure if an LPI is used anywhere in St. Louis County, or the rest of the region.

— Steve Patterson

 

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