This sign appears at a lot of intersections in the Denver area, and I have absolutely no idea what it’s meant to signify:

Is the crosswalk wheelchair accessible? If so, why would drivers specifically need to know that? Is the rightmost lane of traffic designated for handicapped drivers? Perhaps the cross street features a wheelchair store? Wheelchairs can only cross the intersection when the rightmost traffic light is green?

Street signs are meant to communicate important information to motorists and pedestrians, and in this case I honestly have no clue what’s being communicated.