i was chastised once for confusing siding and spur. My understanding is a (passing) siding has turnouts at both ends allowing one train to pass another. A spur has a single turnout and provides a location for cars to be (un)loaded.
The mainline would be blocked while a car is being switched on a spur without a siding. Presumably this would be done while no other trains are scheduled on the mainline at that time or are stopped at a nearby siding while the cars are switched and until the local clears the main at a nearby siding.
A siding (or run around) would be needed if the spur is facing the engine. A trailing spur allows the engine to pull a car paste the turnout and push the car into the spur. I assume a train moving in one direction would switch the all the trailing spurs in that direction and a train moving in the opposite direction would switch the remaining spurs, as needed.
greg - Philadelphia & Reading / Reading
Greg it is a bit confusing but I do understand what your saying.
Lynn
Present Layout progress
http://cs.trains.com/mrr/f/11/p/290127/3372174.aspx#3372174
I know I'm a bit slow coming back to this but work tends to get in the way as well as the change of season, yardwork etc. I managed to get the elevations to show on the plan. If I click anywhere on the plan it shows the Grade but I'm not exactly sure how to display grade for the jpg.
Still working on the plan
%5BURL=http://s1004.photobucket.com/user/lynnboydpics/media/2016%20layout/IMG_1142_zpsbqaftjov.jpg.html%5D%5BIMG%5Dhttp://i1004.photobucket.com/albums/af170/lynnboydpics/2016%20layout/IMG_1142_zpsbqaftjov.jpg%5B/IMG%5D%5B/URL%5D
Still working on plan
http://i1004.photobucket.com/albums/af170/lynnboydpics/2016%20layout/IMG_1142_zpsbqaftjov.jpg
Photobucket has been slower than molasses in December lately. How much aisle space do you have between the two loops at the bottom?
Henry
COB Potomac & Northern
Shenandoah Valley
BigDaddy How much aisle space do you have between the two loops at the bottom?
How much aisle space do you have between the two loops at the bottom?
Rich
Alton Junction
30 inches between the two loops. I see I lost a piece of benchwork, all corners will be trimmed down for round fascia board.
I believe your two reversing loops are going in the same direction. Is that your intent?
floridaflyer I believe your two reversing loops are going in the same direction. Is that your intent?
If it is it was
never a concern.