When we first started encountering this intersection, we assumed that one could only proceed if these lights were green. While nobody ever honked at us when we stopped at a red arrow, we saw many other vehicles run through the light. We weren't sure if they were being cavalier about the law, or if it was legal to turn right on red. Apparently, we're not the only people to be confused at intersections like this one:
Confusing, indeed, but this answers my question. Now we proudly drive through red arrows at this intersection without hesitation (unless there's a car coming, of course).State Sen. John Griesheimer has asked the Missouri Department of Transportation (MoDOT) to remove the "Right Turn Signal" signs at Highway 100 and Route A/Jefferson Street [note: this is not the intersection pictured above]. He says the signs are confusing for motorists and are causing traffic backups at the intersection.
"People think they have to wait for the green light in order to make their turn," Griesheimer said. "I think it's causing an awful lot of confusion. It did for me. I was confused," he said.