Model Railroad Hobbyist | May 2016 | #75 MRH Q-A-T column compiled by Joe Brugger Questions and Answers Wayward signals Q. While driving along the central corridor of the Union Pacific I saw some very interesting signals.  Most were fac- ing down the main line so that the engineer could see the face of the signal. However, some locations had additional signals at 90 degrees to the main line, so I could see the face of the signal while I drove along the highway [1]. Some faced toward the mountainside.  I even saw, at one location, a set of signals that faced 90 degrees to the tracks without any sig- nals facing down the right of way. Can anyone shed any light on these signals? —Art A. What you saw is a signal system in the process of being updated: Chiloquin Russ: The railroad needs signals to be in service all the time, so while they install the new ones they keep the old ones functioning.  When the section is complete and they have XX MRH QUESTIONS, ANSWERS, AND TIPS • INDEX • TABLE OF CONTENTS