On PS4 Scenario: MP36PH - 3C introduction 6.8 kilometres before Redwood City coming to red signal (210 - 2) and can't finish training module of MP36PH. Contacting signaller but are denied because of no route avaiable
Simply restarting the scenario again after i have turned off the ps4 and tried again later. I've waited at signal for a while ( i don't remember how many minutes i've waited or many times contacting signaller) and luckilly turned green. But first I always recommend to restart ps4. If this doesn't work, the only solution i can think in attemp to fix this issue is trying to restart scenario again and waiting at signal for a while contacting signaller until it turns green without saving game.
On my third try, I realised that just before the stop signal on the map was a blue dot - so I put power on 1 and crept up to it. The light went green, a message quickly popped up about the emergency stop and I was able to proceed.
There's several bugs including this one when trying the "MP36PH-3C Introduction" and "Bi-Level Cab Car Introduction" in TSW3 on PS5. TSW3 is confused about which side of the passenger doors should be opened (and for "MP36PH-3C Introduction" the wrong side is automatically opened). The simplest workaround is to open doors on both sides at each stop (each side only partially satisfies what the game expects for the scenario to properly continue). For "MP36PH-3C Introduction" as mentioned there's a red light and creeping up to it (get within 20-25 feet) will allow the scenario to continue. After completing the scenario no medal will be awarded, regardless of score (and 0 is recorded if you revisit the scenario on the menu).