There are, yes. The eastward signal authorises an eastward train to leave that stub track. The issue is when a westward train is routed to enter that stub track. Because the siding is not "bonded" (ie not wired to detect occupancy), the signal indication that the train is governed by is more restrictive, and the train has to enter under more restrictive rules, because once it enters that zone it "disappears" from the signalling. If a previous train had entered the siding, and a second train were routed towards it, the signalling would allow the second train to enter the first train's space. (The RTC's console "remembers" that the first train was there, but that doesn't provide fail-safe assurance to keep the two trains apart).
The same thing was true at West Harbour when it first openend, and the signalling there is now upgraded to protect trains in the depot, and to allow them to enter the station at a higher speed. Same with the stub track at Pickering.
If I were ML I would reconfigure the tracks east of the platform, signal the west end of the siding, and bond/signal the siding proper, so that two GO trains could meet and pass using only Track 3 and the "stub" track without encroaching on the two northward tracks that CN needs for freight. That would make a couple of things possible, one being turnback service to Bramalea interleaved with the existing through trains.
- Paul