This page contains a Flash digital edition of a book.
Transfer Run SP Brooklyn to UP Albina yard “Transfer Run” eases past the home signal pro- tecting the entrance to East Portland Junction. The red-over-red-over-yellow aspect with Speed Signaling would indicate to proceed at Restricted Speed. How- ever, with Route Signaling, as used on the SVOS, the aspect denotes a Diverg- ing Approach, i.e., switches through the interlocking plant are lined for a diverg- ing route and approach next signal prepared to stop. With that aspect, and with route signaling, it is up to the crew to know the prescribed speed through the junction either from the employee timetable or spe- cial instructions. Conversely, with speed signaling, the signal aspect itself defines the permitted speed through the junction. It’s important to point out that with route signaling, a red-over-yellow-over-red also would be a Diverging Approach. However, this aspect would correspond to a route with a higher prescribed speed noted in the employee timetable or special instruction. Specifi- cally, the third head is added to route signaling to take ad- vantage of a wide range of prescribed speeds through a junction. Fundamentally, without the third head, all diverging movements would be limited to the prescribed speed through the most restrictive route.


Tower Operator Stu Steward, with 42 years seniority on the SVOS, operates BK Tower an Entrance-Exit (N-X) Interlocking Plant converg- ing 19 tracks down to 4. The signal bridge just to the immediate left of the tower is the boundary controlling all west- end traffic in and out of Harriman Passenger Terminal and SP Brooklyn Freight Yard in Portland, Oregon. Currently Stu has Train 9, The Shasta Daylight, lined and departing from Harriman via the Passenger Main simultaneously with Extra 5354 East arriving Brooklyn via the Freight Main.


FEBRUARY 2016 57


Page 1  |  Page 2  |  Page 3  |  Page 4  |  Page 5  |  Page 6  |  Page 7  |  Page 8  |  Page 9  |  Page 10  |  Page 11  |  Page 12  |  Page 13  |  Page 14  |  Page 15  |  Page 16  |  Page 17  |  Page 18  |  Page 19  |  Page 20  |  Page 21  |  Page 22  |  Page 23  |  Page 24  |  Page 25  |  Page 26  |  Page 27  |  Page 28  |  Page 29  |  Page 30  |  Page 31  |  Page 32  |  Page 33  |  Page 34  |  Page 35  |  Page 36  |  Page 37  |  Page 38  |  Page 39  |  Page 40  |  Page 41  |  Page 42  |  Page 43  |  Page 44  |  Page 45  |  Page 46  |  Page 47  |  Page 48  |  Page 49  |  Page 50  |  Page 51  |  Page 52  |  Page 53  |  Page 54  |  Page 55  |  Page 56  |  Page 57  |  Page 58  |  Page 59  |  Page 60  |  Page 61  |  Page 62  |  Page 63  |  Page 64  |  Page 65  |  Page 66  |  Page 67  |  Page 68  |  Page 69  |  Page 70  |  Page 71  |  Page 72  |  Page 73  |  Page 74  |  Page 75  |  Page 76  |  Page 77  |  Page 78  |  Page 79  |  Page 80  |  Page 81  |  Page 82  |  Page 83  |  Page 84  |  Page 85  |  Page 86  |  Page 87  |  Page 88  |  Page 89  |  Page 90  |  Page 91  |  Page 92  |  Page 93  |  Page 94  |  Page 95  |  Page 96  |  Page 97  |  Page 98  |  Page 99  |  Page 100