President Donald Trump's administration has given New York City a deadline of March 21 to end the congestion pricing program begun last month, a policy that was intended to reduce traffic in Manhattan's central business district and raise money to upgrade aging subway and bus systems.

The transportation secretary said he would revoke federal approval for the program, citing the cost to motorists; the Metropolitan Transportation Authority quickly filed a lawsuit to stop the move.

Last week, the Transportation Department said it was rescinding federal approval of New York City's congestion pricing program designed to reduce traffic and raise money to upgrad