'Practically perfect in every way': Mary Poppins crosswalk lights

Where I live “Don’t start crossing, but finish crossing if you’ve already started” is represented by the red symbol flashing (as opposed to staying lit continuously for “Don’t cross.”) In this case I suggest instead using a yellow umbrella flying around like some sort of arrow. Even better would be if that symbol were accompanied by some sort of whistling noise, to assist vision-impaired pedestrians.

Finish crossin’ quick, y’all!