49 CFR §236.55
Verified against eCFR.gov as of June 20, 2026View official text on eCFR.gov ↗
Where dead section exceeds 35 feet, a special circuit shall be installed. Where shortest outer wheelbase of a locomotive operating over such dead section is less than 35 feet, the maximum length of the dead section shall not exceed the length of the outer wheelbase of such locomotive unless special circuit is used.