The reason for the new thread? Well, a separate topic for operation of the new line may make discussion a little easier. Another is this recent blurb from Second Avenue Sagas concerning the headways on the eponymous subway line:
MTA Board to approve W train resurrection as 2nd Ave. Subway operations come into view
...The Q will no longer stop at 49th St., eliminating an unnecessary choke-point between 34th St.-Herald Square and 57th St., and when the Second Ave. Subway opens, the Q will run from 57th St. to 63rd St./Lexington, 72nd St., and 86th St. before terminating at 96th St. and 2nd Ave. The Upper East Side won’t know what hit them.
But there’s a rub, and in a way, I’ve buried the lede again. The Upper East Side may be thrilled with the subway, but they’ll be less thrilled with the headways on the Second Ave. Subway which threaten to be the longest in the city for peak-hour service. During the public hearings on the W train proposal, one person asked the MTA to disclose headways on the Second Ave. Subway, and the answer is in these tables:
<see the link for the tables>
As you can see, the MTA isn’t really revising the Q train schedule to respond to shifting demand. Currently, Q trains are relatively empty crossing the Manhattan Bridge into Brooklyn in the morning and vice versa in the evening. When the Second Ave. Subway opens, while the Manhattan Bridge ridership likely won’t change, Q train demand south from 96th St. to parts south in Manhattan will spike, but the MTA is planning to run trains at eight-minute headways. Only weekend, midday and evening Q service will see improvements when the Second Ave. Subway opens, and Upper East Siders are going to be shocked at the long waits, especially when compared with the peak-hour frequencies on the 4, 5 and 6.