From a policy standpoint, they're like traffic lights or stop signs.

This can be used for new traffic lights or sidewalks or a whole variety of things.

Red is one of the strongest colors, it's blood, it has a power with the eye. That's why traffic lights are red I guess, and stop signs as well... In fact I use red in all of my paintings.

There were no gates, no lights, no bells, no stop signs to warn of an oncoming train, ... One month before our accident a man was killed there, and one week before our accident there was another accident. In all there were eight people killed in a period of seven years at this one particular crossing before gates and lights were installed.

You're not going to stop the traffic backup.

Problems are not stop signs, they are guidelines.