The feds are saying “hail, yes” to claims that the city’s Taxi and Limousine Commission discriminates against disabled riders.

The Manhattan US Attorney’s Office yesterday joined a suit that charges officials with violating the Americans with Disabilities Act by failing to provide enough wheelchair-accessible cabs.

The Manhattan federal-court filing says that while only 232 of the city’s 13,237 taxis can accommodate wheelchairs, the TLC wants until mid-2012 to start a new dispatch program and win state approval for more medallions for accessible cabs.

A ruling against the TLC “is all the more important now because it will likely have a significant impact on both the city’s implementation of an accessible-taxicab dispatch system and its selection of the vehicle that will become the ‘Taxi of Tomorrow,’ ’’ court papers state.

TLC Chairman David Yassky responded in a statement: “The lawsuit is misguided; our dispatch system will be in effect in less than six months and will provide for high-quality taxi service for all New Yorkers with disabilities.”

The original lawsuit was brought in January by several groups representing the disabled.