In NYC, Grades 6 and under can get school bus transportation, but all grades, 7 and up, can not, and must use public Transportation.
My sons yeshiva realize this is a big problem and really prefer the boys not use public transportaion. They offer a van service, at additional cost. Also, many mothers carpool.
Yank you don’t seem to understand how it works in the states. Some yeshivas do have their own private school buses and it is not an issue. Go to Williamsburg and Boro Park and see all the buses with the yeshivas name on the side. The parents pay extra to use that service.
The yeshivas also have the option to have the city pay for the childrens transportion to and from school, using the public transportation system which is free, which is great, but on the Ruchinus side, the adverts plastered all over the buses and trains are terrible and when the Public Schools get out, the kids are yelling obscenities, running, and fighting each other. I live on a block with a public school and do not like to be around when they get out.