If you live in Williamsburg and you kids go to school in Borough Park, The city does not pay for school busing, It is more than 2 miles away
How come you are not talking about the safety of those students, and other than the b110 bus its not so easy to get from Williamsburg to Borough Park via Public transport , which is what NYC students do for the most part.
I know people who live in Far Rockaway and go to School in Brooklyn and the city does not pay busing, you are on your own.