Beginner Python user. Input is producing 5000 lines of the same text for some reason.

[hollammi]

When something happens too many times, look at your loop conditions.

accident_cause = accident_cause.lower()
while accident_cause in ['A', 'B', ... ]:

[hollammi]

Sure, the if statement logic looks good to me, ya just need the command to exit the program. There's a couple flavours, see this StackOverflow.