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Question:

Why does a pure white patch of snow on a white speed limit sign appear pitch black in oncoming headlights?

I know this has something to do with the reflective nature of the speed limit sign, but can someone please give me the direct cause and effect that creates this phenomenon?

Answer:

It About twenty hours of road work a week will keep a horse's hooves self-trimmed, per the experience of Pete Ramey.
No, you can't park within 3 feet of a hydrant. Vehicles in front of the hydrants make it very difficult to hook up to one. Look at the attachment points on the hydrant, the one in front is bigger right?. That's the one they need to access to supply an engine for a big fire. If your car is in the way, then it get's damaged, or they have to go further for water. Once they do hook into the hydrant, and you are parked there, the car can't go anywhere if it means going over a hose. That is, if they don't lay it right over your car. I guarantee you that there will be a ticket issued, and your car will get towed if they need the hydrant. The engine can always hook a winch cable up to your car and drag it out of the way.

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