More generally, passengers who believe they are being kept informed will wait much longer before self-detraining than those who believe otherwise - this means that announcements that convey, relevant, useful information in an honest and non-patronising manner will give the railway longer (sometimes significantly longer) to resolve the issue than either no or bad announcements.
This is where the railway needs to communicate effectively, as it is 90% of announcements are just background noise to ignore.
At what point do you take action to release yourself at a safe place like the train at a platform?
5 - 10mins if nothings been announced and train isn't moving?
3 - 5mins if doors don't open and train moves off without anyone saying why?
10 - 15 min if staff say why you are stuck and it will be resolved soon?
Instantly if you spot an incident and need to exit ASAP?
If staff say ''we cannot operate the doors use the release handle on the platform side''.
There will be enough passengers onboard who'll be listening out for ''important information'' that can be trusted to open the doors themselves if its the instruction and will be helping the one who may try to open and exit the wrong one side.