I’d rather have auto manufacturers figure out creative solutions to this problem rather than screw up auto designs for generations because of some broad-sweeping regulation.
What if it was something like crash safety testing, where an outcome (forces on a crash test dummy) is mandated rather than a specific design? You could have something like a visibility requirement (for instance, driver can see the pavement three feet ahead of their front bumper) and then car companies could figure out how to comply with this (lower the height of the vehicle, make a larger windshield, etc).