[Code of Federal Regulations] [Title 49, Volume 8] [Revised as of October 1, 2004] From the U.S. Government Printing Office via GPO Access [CITE: 49CFR1242.17] [Page 175] TITLE 49--TRANSPORTATION CHAPTER X--SURFACE TRANSPORTATION BOARD, DEPARTMENT OF TRANSPORTATION (Continued) PART 1242_SEPARATION OF COMMON OPERATING EXPENSES BETWEEN FREIGHT SERVICE AND PASSENGER SERVICE FOR RAILROADS\1\ --Table of Contents Sec. 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.