I did not mention that the demo video was with a raised barrier crossing. It seemed strange to me because I allow for less clearance when the railway crossing has a raised barrier (I look at it as a normal crossing with green light). Google's AI was more conservative than I would have been in the same situation.

When there are no barriers installed we're already talking about a different situation and all cars should stop and confirm there is no train approaching.

Even with barriers, you don't really have all the much time between when the barriers come down and when the train will cross the road. You don't want to be stuck waiting for the person ahead of you to go.

I don't know about other places but where I live you can have up to several minutes between lowering barriers and train arriving. It's true that even this may not be sufficient in some circumstances.