2006-09-27 00:33:06 · 18 answers · asked by Anonymous in Science & Mathematics ➔ Other - Science
Because some one cleans them...I saw them the other day!!
2006-09-27 00:34:48 · answer #1 · answered by Anonymous · 0⤊ 0⤋
they do, you must live in a nice area where the council give them a clean every so often.
the council or highways agency have a duty to keep them clean, can you imagine if someone had a bad accident as a result of not being able to read a warning sign or something. The council or whoever would be sued for loadsa money.
2006-09-27 07:40:34 · answer #2 · answered by Emma-Lou 5 · 0⤊ 0⤋
I don't know where you live, but here they do. Every winter, the salt spray forms a gray/white film on street signs. (salt highway dept puts down on roads to melt snow). Every spring, the crews go out and spray the signs down.
2006-09-27 07:36:27 · answer #3 · answered by Anonymous · 1⤊ 0⤋
They do. I've had to get out of my car and clean one to make sure I was on the right road.
2006-09-27 07:41:32 · answer #4 · answered by Sarah A 6 · 0⤊ 0⤋
I've seen plenty of dirty ones!
2006-09-27 07:41:20 · answer #5 · answered by ? 6 · 0⤊ 0⤋
The Highway Management Services usually do cleaning them :)
"Checking, cleaning and repairing street furniture so it continues to serve its purpose and be safe"
2006-09-27 07:43:20 · answer #6 · answered by Jacky Chan 3 · 0⤊ 0⤋
They get washed with all the water on the road (depending on where you live)
2006-09-27 07:37:35 · answer #7 · answered by Citizen Mac 6 · 1⤊ 0⤋
What signs you looking at? All the ones Ive seen are filthy
2006-09-27 07:34:53 · answer #8 · answered by OriginalBubble 6 · 1⤊ 0⤋
Because the elves come out at night and clean them.. Shhhh
2006-09-27 07:34:25 · answer #9 · answered by DemonicaB 3 · 0⤊ 1⤋
YA THEY GET DIRTY BUT SOME SOCIAL WORKERS CLEAN THEM UP OR RAIN WASHES THEM AWAY.
2006-09-30 07:38:27 · answer #10 · answered by SLYVESTER C 1 · 0⤊ 0⤋