You could argue that people cannot be expected to carry tape measures with them, because their glove compartments are too small.
But the difficulty of judging the distance from the intersection is a factor in a minority of cases.
SFMTA could have chosen to enforce the law but allow a tolerance of 5 feet. That would start providing safety benefits earlier without surprising any driver who made an honest mistake in their estimate of the distance.
You could argue that people cannot be expected to carry tape measures with them, because their glove compartments are too small.
But the difficulty of judging the distance from the intersection is a factor in a minority of cases.
SFMTA could have chosen to enforce the law but allow a tolerance of 5 feet. That would start providing safety benefits earlier without surprising any driver who made an honest mistake in their estimate of the distance.