NEW YORK (CNN) -- Some New York students with a ride to school this morning may not have one by Wednesday.
Union leaders say a New York City bus drivers may go on strike. That would mean more than 150,000 public school students would have to find another way to school.
Drivers are disputing a new contract that could mean some lost jobs.
Current contracts are set to expire at the end of June.
The department has already prepared for a walkout, buying public bus fare cards for students.
Companies that operate the buses have already started posting help wanted ads for replacement drivers.