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If owned by employer, yes.
"A driveway alert system would only work in another place if there were a receiver there. A driveway alert system needs a recover to work so, if there was one placed in a parking lot then it would work."
Are there power washing companies that work on very large areas like parking lots? Are there companies that have like trucks that do the spraying rather than hand held sprayers like you normally see?
As long as they actually work, there is a slight danger in that the wiper may create a blind spot in your view. Other than that, I see no danger.
it could be the headlight relay. if not it may be in the switch.
If you more specifically meant "why does it roll even after you put it into park?" its because the parking gears are sliding into spot. When you throw the car into park the gears attempt to push into their proper place, then when you let off the brake they slide into their spot, and theres room to work with so your car may roll back and forth. That's why if you have a large truck with huge parking gears like the Allison transmissions do the gears will produce a loud click as they literally fall into their designated spot and clang against the transmission's teeth.
As a resident of the District, the best place is where it's close to work that doesn't have a parking meter. If you plan to park near your work, and it doesn't have it's own parking, I'd advise that you go as early as possible because finding a "good" parking spot in D.C. is like running home in 100+ degree weather to make sure your ice cream doesn't melt. Sometimes you get lucky, most of the time you don't. Otherwise, buy yourself a SmarTrip and use the Metro.
Work, School, Parking lot, and Highways because that would be awesome.
If all other lights work then make sure that the parking light bulbs are good. Check for a parking light fuse and relay, to insure that the work properly.
Because handicap people like to do construction work?
I would start with replacing the head light switch
iT CAN BE WIRING OR BAD HEADLIGHT SWITCH.