49 CFR § 1242.58
Operating signals and interlockers, operating drawbridges, highway crossing protection (accounts XX-51-59, XX-51-60 and XX-51-61)
November 18, 2020
Separate common expenses on the basis of total train hours (including train switching hours) of the particular common operating divisions or track segment on which the common signals, interlockers, drawbridges and highway crossings are located.