Article in the Washington Post on escaping a car in the water:
Advise I didn't know.
You have till the car submerges to get out. After that you are rarely going to make it.
Car window breakers won't work. After you sink, even a hammer won't work.
Open the windows not the doors.
Don't get out first push the kids out (biggest first).
https://www.washingtonpost.com/travel/tips/car-underwater-escape-bridge-collapse/Frightening link to an AAA study in it.
Contains the following:
'an increasing number of vehicles are being built with laminated
side window glass, which is nearly impossible to break.'
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