The city’s plan to ban cars on 14th Street and add scores of buses during the L train shutdown will cause horrific conditions in the affected neighborhoods, a lawsuit filed on Tuesday charges.

The federal suit, which names the MTA, the city transportation department and the Federal Transportation Administration, accuses the agencies of pushing through a plan without doing an environmental study or considering how it would affect nearby residents.

“They could have taken another year but they chose to do two tubes simultaneously. They could have done weekends and nights which could have eliminated all of the displacement,” said Arthur Schwartz, who is a resident and filed the suit on behalf of a group of Greenwich Village and Chelsea block associations. “I don’t understand why they had to opt for the most severe consequence.”

Residents say they are terrified that the plan will lead to unrelenting congestion and that ambulances will not be able to get to hospitals, thousands of bikes will whiz by elderly residents, and the streets will be choked by bus pollution.

“It has nothing to do with inconvenience,” said resident Stanley Bulback. “It has to do with first responders being able to get through and our children and congestion.”

The suit asks for an injunction until the agencies complete an environmental study. It also demands that the MTA add elevators to all of the L train stations along the corridor.

Critics of the lawsuit say it is the height of NIMBYism.

“Are we going to let a handful of residents from one neighborhood invalidate the needs of people from all along the L train corridor? Imagine the precedent this would set.” said Joe Cutrufo, spokesman for Transportation Alternatives. “Without the L train, we’re going to have to use the rights of way that that we have and those are our streets, buses and bikes are the most efficient way of moving people across the corridor.”

MTA officials declined to comment directly on the lawsuit, but said they are still working on the final plan.

“The repairs to the Sandy-damaged Canarsie Tunnel are desperately needed to ensure the tunnel’s structural integrity so we can continue to provide safe and reliable subway service to hundreds of thousands of New Yorkers who depend on the L train every day,” said agency spokesman Jon Weinstein. “We are working with our partners at NYC DOT to craft a thorough and robust mitigation plan.”

DOT officials said they are aware of the pain the shutdown will cause, but don’t think a lawsuit will ease it.

“We don’t think the lawsuit has any merit, but I’ll say we want to continue to work with the public,” said Commissioner Polly Trottenberg. “We recognize what a challenge this is, but this is one where we really hope the standard is that we all try to work together. I’m not sure that getting involved in litigation is going to help us with this really unprecedented challenge.”

The 15-month-long repair plan — to mend damage to the L-train tunnel caused by Hurricane Sandy — is expected to kick off in April 2019.