There are laws of discrimation in this country and unless its a job where you can say no females are allowed (Like say a Rabbi or mens room attendent) you HAVE to allow females to drive the buses if they are qualified.
If the Buses are paid for with Tax Dollars by the city of Lakewood (as opposed to private funding by parents) even more so as the buses are contracted by the City of Lakewood who must obey the laws of the State of NJ and federal laws.