Sidings often have lighter rails meant for lower speed or less heavy traffic and few if any signals.
How long ar train sidings.
Railroads if at all possible tried to make passing sidings longer than the longest train to run on the line so normally a train wouldn t have to be squeezed into just fitting into a siding.
To model that era effectively 30 50 car trains are good so passing sidings of 18 to 25 actual feet would be best for a large class i line.
Of course sometimes the train is too long and to pass another train they have to do a saw by.
A siding in rail terminology is a low speed track section distinct from a running line or through route such as a main line or branch line or spur it may connect to through track or to other sidings at either end.
But that assumes the rest of the layout is large enough to support 30 car trains.
By that time most class i railroads ran trains of 1 2 to 1 mile in length so a mile would be typical for passing sidings.
This research seeks to characterize the interaction between passing siding and train lengths and the subsequent effect on train delay.