On semaphore signal sections, R3D only clears the line 2 sections ahead. However, where sections are short, several sections would be cleared at once to give the the train a clear run without delaying it - when the section time is 30 seconds, it is a bit difficult to get a line clear and pull the signals. This is compounded even further by slotted distants, where the train has already passed a box's outermost distant before it is even offered to the box in R3D! Can some sort of "short section" option could be added to R3D, whereby it will attempt to set a route onwards as soon as a route is set to the signal, but doesn't prevent the signal in rear from clearing if it can't - a sort of "loose" lock-through.