New York’s first-in-the-nation plan to levy a hefty toll on drivers entering much of traffic-choked Manhattan was the focus of a legal battle playing out in federal court Friday.

A Manhattan judge is hearing arguments in a series of lawsuits from unionized public school teachers, local Republican officials and other New Yorkers seeking to put the brakes on the plan set to launch June 30.

Most drivers in private cars, locals and tourists alike, heading into Manhattan south of Central Park should expect to pay about $15 during the daytime, with higher tolls for larger vehicles and lower rates for motorcycles and late-night entries into the city, according to the proposal finalized in March. Those who aren’t enrolled in a regional toll collection program will pay $22.50.

Workers at two Mercedes-Benz factories near Tuscaloosa, Alabama, voted overwhelmingly against joining the United Auto Workers on Friday, a setback in the union’s drive to organize plants in the historically nonunion South.

The workers voted 56% against the union, according to tallies released by the National Labor Relations Board, which ran the election.

The NLRB’s final tally showed a vote of 2,642 to 2,045 workers against the union. A total of 5,075 voters were eligible to vote at an auto assembly plant and a battery factory in and near Vance, Alabama, not far from Tuscaloosa, the board said. Nearly 93% of workers eligible to vote cast ballots.