Skip to Content
Streetsblog New York City home
Streetsblog New York City home
Log In
MTA

Is the MTA Doing Enough to Keep Its Subway Cars in Working Order?

4:26 PM EST on January 23, 2017

A dangerously crowded 7 train platform earlier this month. Photo: Luke Ohlson

If you've been on the subway recently (say, this morning), you probably get the feeling that service is on the decline.

The MTA released performance metrics today that support that conclusion, but the underlying causes of increased delays -- and how the agency plans to address them -- remain unclear [PDF].

One metric trending in the wrong direction is the mean distance between failures, or MDBF, a key benchmark of the subway's reliability. MDBF measures the frequency of delays attributed to train-related mechanical failures, and the 12-month average dropped 16 percent from November 2015 to November 2016.

Service failures are becoming more common the MTA subway cars, but why? Image: MTA
Train failures are becoming more common on the subway, but is it because of maintenance lapses or a consequence of more benign factors? Image: MTA
Service failures are becoming more common the MTA subway cars, but why? Image: MTA

Is the MTA scaling back on crucial maintenance, or are we seeing fluctuations that should be expected as different classes of subway cars go through their lifecycles?

Unfortunately, the information provided by the MTA about train failures doesn't say very much. We can see how long different classes of train cars go between failures, but not the reasons for those failures -- or what the agency is doing to address them.

"The MDBF decline is unsurprising -- the car breakdown rate systemwide has been on a steady decline for years," Jaqi Cohen of the Straphangers' Campaign told Streetsblog. "But ultimately we need more information from [the MTA] to be able to definitively understand why these failures are happening."

When riders abandoned the subway a generation ago, train breakdowns were much more frequent. The specter of even a partial return to the bad old days of subway maintenance is very alarming.

But there's a lot of uncertainty and room for interpretation in the information that's publicly available from the MTA. While the system's oldest cars are declining rapidly, the impact on service reliability could actually be very small, since those cars are a tiny share of the total fleet.

When cars are new, failures are rare, then there's a period where they come much more frequently before leveling out, which may explain why the 10-year-old R160 cars saw the third-largest change of any car type in the system.

The MTA attributes 2.8 percent of November's subway delays to car equipment failures, but the magnitude of those delays is itself uncertain.

The big concern, as stats show train failures becoming more frequent, is whether the agency is taking appropriate steps to maintain its fleet. In the absence of a more detailed public progress report from the MTA, transit riders are left to assume the worst.

Stay in touch

Sign up for our free newsletter

More from Streetsblog New York City

POWER PLAY: City Moves to Put Thousands More E-Car Chargers on the Sidewalk

We should stop and think before giving over curbside space to car drivers, a mistake the city made in the 1950s.

February 22, 2024

Bill to Cut Vehicle Miles in New York Would Also Reduce Traffic Deaths, Costs and Pollution

"As this data makes clear, a new approach will not only protect our climate, but also make New York a safer, more affordable place to live," said state Sen. Andrew Gounardes.

February 22, 2024

Thursday’s Headlines: Celebrate What’s Good About Our City Edition

It's now less than one week til the annual "Public Space Awards" on Thursday. Get your tickets now. Plus other news.

February 22, 2024

Underhill Ave. Still In Limbo Two Weeks After Mayor Promised Decision in ‘A Day Or So’

The mayor's perception of time differs from that of mere mortals, but he did say on Feb. 5 that he would decide "in a day or so." It's been two weeks.

February 21, 2024

Data Dive: More Delivery Workers are Registering Their Mopeds 

“If you have plates, [the police] won’t summons you,” Junior Pichardo told Streetsblog the other day on Flatbush Avenue. “They won’t bother you.” 

February 21, 2024
See all posts