Everything you ever wanted to know about anything but were afraid to ask. Especially things someone else might Google for some day. Questions must have fact based answers. Welcome to the FREE-FOR-ALL SUMMER! In the spirit of the season, we are throwing open our doors to questions of all types. Please note that
style posts, troll/shit posts, or other extremely inappropriate posts will still be removed. Go ahead and ask your questions, reddit!
ALL comments must be helpful and related to the topic at hand. Rules All comments must be helpful and relevant. Questions are ok; memes are not! These questions will be better for Baiting people, passive aggressive posts etc. is not allowed Remember the human. If you believe one of your posts has been removed in error, please do not hesitate to. People often associate police with the color blue — their cars and uniforms are often this color.
The police in our town have cars with all kinds of colors of flashing lights on them — they have white, red, and yellow lights. Their main purpose is to get your attention and to get you to realize that they are police and not some other people with flashing lights. Non-police cars and trucks usually have yellow flashing lights to warn you that they may be moving slowly or may be making frequent stops.
Examples include tow trucks and street sweepers. You want to be able to distinguish these from police and fire vehicles, even late at night when all you can see is their lights, so that you know when to pull over when they come zooming by. Blue isn\’t the greatest color for visual perception, as we answer elsewhere in this archive, but it works fine for the purpose. (published on 10/22/2007)