car mileage

noun2

1. •
   Car miles collectively.

   • That the passenger car mileage for the entire system for the year ending June 30th, 1906, was 44,779,961 miles, of which 6,812593 miles or 15.214 per cent., was in the state of Washington. — 1908
2. •
   The amount paid by one railroad for the use of cars of another railroad.