This is from the Ohio Dept. of Ed. Website, Pupil Transportation
(1) Each school district shall establish its own reasonable travel time.
Travel time is defined as beginning at the initial pickup of the child
and ending with the final arrival at the school destination.
The school district shall develop its travel time standard,
approved by the individual board of education, and shall consider
the following factors: age of child, condition of disability,
geographic size of school district, location of special education
class, traffic patterns, and roadway conditions.