Frontrunner does not quote train numbers to the public, just departure times. But it does use logical numbers for CTC dispatching purposes. Note that the following photos show in succession two northbound trains at Salt Lake Central Station. In succession the logical numbers are 1 and 2 (note that there is no odd/even scheme as in moving away from headquarters). The first two photos show to-be dispatched train #1, using loco #4. The next two photos show to-be dispatched train #2, using loco #9. Next