“What you measure is what you get,” the saying goes. In transportation, the dominant metrics are all about moving motor vehicle traffic, so America has built a transportation network that moves a lot of cars. Our streets may be dangerous, expensive, and inefficient, but they do process huge volumes of motor vehicles.
A quintessentially American transportation metric — and a highly influential one — is the Texas Transportation Institute’s congestion report, which ranks cities based on the time drivers spend moving slower than “free-flowing” traffic. By focusing so intently on driver delay, the report obscures more meaningful information, like the total time people spend commuting.
City Observatory has been doing a fantastic job debunking the TTI report. On April Fool’s Day, City Observatory’s Joe Cortright published a tongue-in-cheek takeoff on TTI’s methodology that he’s calling the “Pedestrian Pain Index.” The idea sounds simple: What if we measured the transportation system for pedestrians the same way we measure it for drivers?
The Pedestrian Pain Index sums up how many minutes people around the country spend waiting for the “walk” signal at intersections. If you multiply that number by the same “value of time” assumptions that TTI uses to assign a dollar figure to the cost of congestion, pedestrian delay at intersections costs the U.S. economy $25 billion annually.
Cortright says it’s not as easy to produce this analysis as the one for car congestion, because transportation agencies have developed all sorts of tools to measure motor vehicle delay. Not so much for pedestrian delay. Here he explains his methodology: