Traffic

Even if you never set foot on a bus or a train, chances are transit is saving you time and money. The most obvious reason is that transit keeps cars off the road, but the full explanation is both less intuitive and more profound: Transit shrinks distances between destinations, putting everything within closer reach.

Since the de Blasio administration attempted to cap for-hire cars this summer, the debate over Manhattan traffic has gotten louder, but not more productive. Uber claimed it definitely wasn't the problem. Some council members wondered if bike lanes were slowing down cars. Amid all the noise, something important got lost.

Crossposted from City Observatory.

After flatlining for nearly a decade, the mileage driven by Americans is rising once again. That means more traffic overwhelming city streets, slowing down buses, and spewing pollutants into the air. But to the Federal Highway Administration, it's a development to report with barely contained glee.

Traffic congestion in the Manhattan core is rebounding. Travel-speed data culled from taxicab GPS and released last month by City transportation and taxi officials suggest that average motor vehicle travel speeds in the Central Business District fell by 8.5 percent from 2012 to 2014. The slowdown follows years of flat or even rising speeds -- a phenomenon that predated the 2008 financial collapse and undermined congestion pricing proposals by making car, bus, truck and taxi travel in the heart of the city a little more efficient and predictable.

This morning on WNYC Brian Lehrer said he didn't understand why Mayor de Blasio would want to penalize Uber for making traffic congestion worse, since the mayor is "causing congestion purposely" to make streets safer for walking and biking.

For a moment yesterday, it seemed like the big clash between the taxi medallion industry and app-based car services, framed in terms of Uber's effect on snarled Manhattan traffic, might veer into unexpectedly brilliant territory. There was Deputy Mayor Anthony Shorris in the Daily News, telling the MTA that City Hall would consider the Move NY traffic reduction plan to fund transit investment. Finally, a sign that some of the big players are getting serious about a comprehensive fix for the city's congestion problem.

Uber blasted out an Excel spreadsheet to reporters this morning, accompanied by a story and editorial in the Daily News, with data providing a snapshot of how many Uber vehicles are on Manhattan streets south of 59th Street, New York's central business district. While Uber claims the data shows its vehicles aren't responsible for congestion in the city core, transportation analyst Charles Komanoff has crunched Uber's own numbers and estimates that the service has actually reduced traffic speeds in the central business district by about 8 percent.

How responsible is Uber for the 9 percent drop in Manhattan travel speeds that New York City transportation officials reported last month? The answer appears to be: quite a lot.