Metropolitan Transportation Authority officials say on Thursday they'll present a midtown Manhattan shuttle train ensconced in advertising for The History Channel.
Thousands of tourists, commuters and residents see the shuttle, which runs between Grand Central Terminal and Times Square.
The MTA faces a projected deficit next year of nearly $900 million. In recent years it has raised fares for subways, buses and two regional rail lines and tolls for bridges.
It also has begun exploring the possibility of cutting subway, bus and commuter rail service.
An MTA spokesman won't say how much revenue the new ad will generate.