They're mandatory in the US, Europe, China and India for starters. At this point it's probably harder to find a country where they aren't.
As for why, the safety data shows that cars with backup cameras are safer for the public than those without, same as seatbelts, airbags, or any number of other safety technologies. You shouldn't need any of them, but they're there to improve the situation when reality inevitably fails to meet our expectations.
As for why, the safety data shows that cars with backup cameras are safer for the public than those without, same as seatbelts, airbags, or any number of other safety technologies. You shouldn't need any of them, but they're there to improve the situation when reality inevitably fails to meet our expectations.
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