
New York City drivers often fail to yield to pedestrians in the crosswalk. More LPIs would help reinforce the rule.
When DOT installed a leading pedestrian interval, or LPI, by a Lincoln Tunnel exit on 34th Street last month, nearby residents were thrilled. Cars turning onto 34th from Dyer Avenue -- a tunnel off-ramp -- had long posed a hazard to people in the crosswalk, leading Community Board 4 to request signal timing exclusively for pedestrians. At first DOT declined to take action, but after 300 people signed a petition in favor of the LPI, it was installed in a matter of days. Now pedestrians crossing 34th enjoy a luxurious 17 seconds during which they have the all-clear.
LPIs make pedestrians safer. The most widely cited study [PDF], released in 1999 by Michael King, former director of traffic calming at DOT and currently a principal at planning firm Nelson\Nygaard, found that LPIs reduce collisions between turning vehicles and pedestrians by 28 percent. Implemented throughout the city, LPIs could cut the number of pedestrians hit by cars by more than 500 each year, the report noted.
The new LPI at 34th and Dyer was a welcome improvement, but why the initial hesitation? After all, installing an LPI amounts to little more than flipping a switch, and costs next to nothing. Current DOT practice, however, requires time-consuming studies of individual intersections to determine whether an LPI is warranted. A different option, which Transportation Alternatives is now pushing, would make LPIs the default condition at the intersections where pedestrians face the greatest threat.
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