Stoplights.
"How many stoplights are on Main Street, if you know?"
Yes
yes
yes
To prevent all the cars crashing into each other at junctions.
It is a switch on the brake pedal which sends current to the stoplights in the rear.
500 feet in Oregon
One possibility is a dying alternator.
If none of the brake lights are working i would suspect the brake switch at the brake pedal.
the sirens tell people that a car is coming also it sends a signal to stoplights for a go.
Hyperbole