Those signs mean you just need to stop, check the traffic, and if it’s clear, then you go ahead and turn right on that red light. Okay, great, but back to my original questions above.

The idea of red meaning "stop" dates back to British railroad regulations of the 1840s—but for a while, a dearth of fade-proof red materials meant that many American stop signs were yellow instead.

Stop Here On Red signs are installed when a stop line in an intersection is not located where a motorist expects it to be, said NJDOT frequently answered questions on its website.

They’re hard to miss, those big red-and-white signs in the shape of a octagon that declare “STOP.” But some Boise-area motorists — including at a main intersection at Bown Crossing — are ...