Maybe the “D” should stand for “dependable.”

The D train, which runs from Norwood in The Bronx all the way to Coney Island in Brooklyn, is the most reliable subway line on weekdays — with trains punctual 82 percent of the time, according to wait-time data analyzed by The Post.

It was nearly tied with the J and Z trains, which run through some of Brooklyn’s hippest neighborhoods — Williamsburg and Bushwick. Those met the MTA’s wait standards 81.7 percent of the time.

Those were followed closely by the N and L trains, which clocked in at 81.5 and 81.3 percent, respectively. Meanwhile the biggest losers for reliable subway travel on weekdays were the 5 and 6 lines, which left straphangers in a lurch after meeting wait-time standards 67.8 and 70.1 percent, respectively.

The R line was excluded, since it ran in two segments during most of last year, as well as the shuttles.

The MTA gives trains a little leeway when calculating whether they make timely arrivals.

For example, if a train is scheduled to arrive every 10 minutes — then it’s given a 2.5-minute window, or 25 percent of the scheduled time between trains.

On weekends, the J and Z topped the list for reliable trains, followed by the 1 and 3 trains.

The F train was the worst weekend train line in terms of reliability, meeting the MTA’s wait standards 76.9 percent of the time.

It was followed closely by the 4, A and C lines, all under 80 percent.

Overall, lettered lines performed better than numbers over the last year , with the N train showing the most improvement.

A spokesman said the MTA is creating new guidelines to make track work less disruptive and improve service– as well as relying on programs like FASTRACK, which shut down large stretches of track for overnight repair work.