How bad is the D?

The D, the bridge-crossing express with a beach at the end

The D is the orange bullet's long-haul specialist, running from Norwood–205th Street at the top of the Bronx down to Coney Island–Stillwell Avenue on the Brooklyn shore. That is a full cross-section of the city in a single ride, and the D spends most of it running express. It shares its color with the B, F, and M, but the D is the one that reliably crosses the Manhattan Bridge and keeps rolling, which makes it both a commuter lifeline and, improbably, a beach train you can board in Midtown.

The route has three distinct personalities stitched together. Uptown it follows the Grand Concourse across the west Bronx, serving the neighborhoods clustered along that grand old boulevard. In Manhattan it runs express down Sixth Avenue, slicing through the heart of Midtown. Then it swings across the Manhattan Bridge into Brooklyn and takes the elevated West End Line all the way out to Coney Island. Each leg feels like a different city, and the same train ties all three into one line. It is a lot of ground to cover, and the long runs and crew changes show it.

Crossing the East River is the showpiece. For a couple of minutes the train hangs above the water and the skyline and harbor spread out around the windows, one of the best free views in New York, and even daily commuters still glance up for it. The elevated run through southern Brooklyn is its own sort of theater, rattling over the streets and past the rooftops on the approach to the amusement district. Few rides deliver such a payoff without asking anything extra of you. Visitors gawk at the view; regulars pretend not to notice, then sneak a look anyway.

The history along this route is thick. The West End Line started life as a surface railroad before it was lifted onto its elevated structure, and the Manhattan Bridge has carried trains for more than a century, which is why the Brooklyn half of the trip has that older, heavier feel. The Grand Concourse stretch reflects the Bronx's grand apartment-building era. You are riding through layers of the city's growth, from boulevard ambitions up north to seaside amusements out on the shore. Each generation built on the one before it, and the D inherited all of it at once.

Riders know the D for its long off-peak gaps and its occasional reroutes. Because the Manhattan Bridge is a single point of failure and the line shares tracks with several neighbors, trouble anywhere upstream can stall your whole trip. Waiting is simply part of the experience when the clock is off. Yet the express running is genuinely quick when everything cooperates, and the clean shot from Midtown to Coney Island is something no other route delivers as directly. Regulars on both Brooklyn branches know which stations to sprint for the instant a train appears.

Crowding arrives in waves: heavy through the Bronx in the morning, heavy through Midtown all day, and heavy toward Coney Island come summer, when half the car is headed for the sand and the other half is returning sunburned and sandy. Because the route is so long, seats open up and fill again as the neighborhoods slide past. Ride it from one end to the other and you will watch the whole arc of who uses the D, borough by borough, stop by stop. The seasons change the crowd more than the clock does.

The verdict: the D is a big, blunt, useful train. It is not the fastest or the most reliable, and waiting for it off-peak can wear down your patience, but it accomplishes something rare, linking the Bronx to the beach across the middle of the city. When everything flows, it covers an enormous amount of ground in one seat, and you can read a chapter on the way. When it does not, you remember exactly how many moving parts the trip depends on. Still, when you need to get from the Bronx to the beach on one fare, the D is the answer more often than not.