(If this appears correctly) it should be ÂµA but it's quicker to type uA. Answer: UA stands for Urine Analysis.. When you pee in a cup and the doctors take it and analyze it to see if you or whoever has done any drugs or drank any alcohol in the past two weeks. Microamperes. The u is the closest letter many computer keyboards have to the Greek mu symbol.
Do not blind other drivers with your high beam headlights. Dim your lights by switching to low beams before you are 500 feet from a vehicle coming toward you. If you are following another vehicle, change to low beams when you get closer than 300 feet. Use your high beams whenever possible as long as it is not illegal (i.e., in open country when other cars are not near or on dark city streets when no other traffic would be affected by your high beams).
You must have your lights on from sunset until sunrise during periods of rain, snow, hail, sleet or fog, and during other periods when you cannot see the road ahead of you clearly for a distance of at least 500 feet. When you are in doubt as to whether you should use your lights or not, turn them on -- low beam. Not only will this improve your own vision, it helps others to see you as well. One of the most common and dangerous habits that drivers can get into at night is overdriving the headlights of their vehicle.