Back up camera's and back up senors are mandatory because kids where getting run over by parents. You can't see short objects by turning your head around.
https://www.kidsandcars.org/how-kids...urt/backovers/
Quote:
In the U.S. at least fifty children are being backed over by vehicles EVERY week.
The predominant age of victims is one year olds. (12-23 months)
Over 60% of backing up incidents involved a larger size vehicle. (truck, van, SUV)
Tragically, in over 70% of these incidents, a parent or close relative is behind the wheel.
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Also many sports cars have shitty rear viability. My car has none.