Interesting, considering you're also trusting:
- the guy who did your MOT for you
- the guy who you bought your car second-hand from, to make sure it wasn't falling apart
- those group of pedestrians who look like they might jump out in front of you
- the person driving the car coming the other way
- the person who taught you how to drive, that they taught you the correct way!
- the people who built your car and built the robots that built your car
- the people who built the road surface, bridges, structures etc
etc etc

if you think about it, with the regular checks that take place on the railways, a lot less can theoretically (and in real life!) go wrong