(CNN) -- Nearly 5,000 commuters in the San Francisco Bay area are urged to find alternate forms of transportation Friday as Golden Gate Ferry ticket agents go on strike.
Commuters should carpool or use the bus service, said Mary Currie, a spokeswoman for the Golden Gate Bridge District.
The current contract with the Inland Boatmen's Union expired at midnight Thursday.
The one-day strike starts at 4 a.m. Friday and continues until 10 p.m., union leaders said in a news release.
At issue is seven ticket-taker jobs the Bridge District wants to eliminate, the spokeswoman said.
The District is trying to find other jobs for displaced employees, she said.
The Golden Gate Ferry runs daily from Sausalito and Larkspur to San Francisco. It will resume normal services Saturday.
The Golden Gate Transit Bus service will operate its regular service Friday and will also offer additional service from the Larkspur Ferry terminal.