Bullshit. If your cars are unable to stop from 50 or 60 mph with a red light then there are 3 possibilities:

1)People driving them should not be allowed to drive them because they are either fucking blind, unable to pay attention, drunk or too stupid

2)Those cars should not have passed the yearly technical evaluation and their registration is not valid

3)The lights themselves are not set up properly or are obscured by something

If you fix all those 3 issues there is no reason not to have higher speed limits on main roads that have only intersections/crossings with lights on them