# 25 CFR § 39.710 - How does a school calculate annual bus transportation miles for day students?

To calculate the total annual bus transportation miles for day students, a school must use the appropriate formula from this section. In the formulas, Tu = Miles driven on Tuesday of the transportation mileage count week, W = Miles driven on Wednesday of the transportation mileage count week, and Th = Miles driven on Thursday of the transportation mileage count week.

(a) For ISEP-eligible day students whose route is entirely over improved roads, calculate miles using the following formula:

$$(b) For ISEP-eligible day students whose route is partly over unimproved roads, calculate miles using the following three steps.

(1)Step 1. Apply the following formula to miles driven over improved roads only:

$$(2)Step 2. Apply the following formula to miles driven over unimproved roads only:

$$(3)Step 3. Add together the sums from steps 1 and 2 to obtain the total annual transportation miles.