Transit union leader Roger Toussaint said he'd march across the Brooklyn Bridge with workers before turning himself in Monday for a 10-day jail sentence stemming from the illegal three-day subway and bus strike that crippled the city in December.

Labor leaders and unionized workers were expected to rally in support of Toussaint behind the state Supreme Court building in Brooklyn. They said they'd march with Toussaint across the bridge to a Department of Correction facility in lower Manhattan.

The Rev. Al Sharpton, who called Toussaint's sentence an immoral attempt to intimidate workers, promised to hold a vigil on the union boss' first night in jail. He said he'd stay in a tent outside the jail to protest.

Last week, Toussaint's union, the Transport Workers Union Local 100, approved a contract he negotiated but members had rejected in January. The Metropolitan Transportation Authority, which runs the transit system, has said it doesn't have to accept the vote because the dispute is in binding arbitration.

Also last week, a judge fined the 33,000-member union $2.5 million for the strike, which shut down the nation's largest mass-transit system just before Christmas. The 60-hour walkout violated a state law banning strikes by public employees. Toussaint has said he plans to appeal the fine.