CFR > Title 49 - Transportation > SUBTITLE B—Other Regulations Relating to Transportation > CHAPTER X—SURFACE TRANSPORTATION BOARD, DEPARTMENT OF TRANSPORTATION (Parts 1000-1019–1332) > SUBCHAPTER C—ACCOUNTS, RECORDS AND REPORTS (Parts 1200-1219–1281) > PART 1242—SEPARATION OF COMMON OPERATING EXPENSES BETWEEN FREIGHT SERVICE AND PASSENGER SERVICE FOR RAILROADS 1 > 1242.17—Signals and interlockers (accounts XX-17-19 and XX-18-19).

1242.17—Signals and interlockers (accounts XX-17-19 and XX-18-19).

Separate common expenses on the basis of the total train-hours in running service, and/or the yard-switching plus train switching hours in the switching service over the tracks on which the common signals and interlockers are used.