Why do highway departments in snowy states paint white lines on roads and not orange?
414939
i think they sometimes use yellow (which is the color of the kind of snow you should never eat ;-)
897042
Absolutely not! It is a "white" Christmas because of snow. It has no racial undertones so don't try to create any. Leave this holiday alone. It is our last symbol of hope and happiness.
719256
Good question.  Maybe they never get cold, but then again, they are always that pasty gray color so who knows.  Now you have me curious.  I'll ask the next one I see.
749044
i love the snow.  I live in VA and I see some snow every year.  Last year all i saw was flurries but the year b4 that we got 14 inches and it was so beautiful.  All the trees were white.  I took a lot of pictures just in case i never see that again. I don't know why people hate snow.  I can't see how anyone can think snow is ugly.  I guess they rather live in hot environments with wildfires than see snow.  It cleans the air and just makes the sky look fabalous after a big snow.
55409
You can use sand but this does nothing to melt the ice. It merely makes it easier to get a little traction so you can drive over it. \n\nRecently, some areas use a liquid chemical de-icing solution (Calcium Magnesium acetate is one such solution) that gets sprayed directly to roads.  It is more expensive than salt.
904698
It is the very complicated surface of the snowflakes.  Ice and water may be clear, but some light is reflected, and some gets transmitted.  In the case of snow flakes, which are ice cristals, there is so much surface to reflect off, and light transmitted leaving off the back will strike the next snowflake behind (or the next bit of the same snowflake, deeper in) and eventually reflect back.  Since the shape is so weird, no coherent reflection can be seen, hence no good mirrored surface.  But the light will come back looking the same color as going in, hence white.
766484
Here in Washington it seems like any time it spits snow they delay or cancel school.\n\n  in reality it has nothing to do with the amount of snow it has to do with trying to get the kid to school safely. As former safety director for a local school district it was ultimately my call and if there was any chance that the weather would signify that it could jeopardize the safety of the kids I would either delay or cancel.\n\n it had nothing to do with the staff they were still required to report to work as with any other job unless it got really bad
36148
Occasionally, jets will pass through a section of air that is thick with moisture, but not solid enough to form a cloud.  When the planes wings pass through the moisture, condensation builds on the wings (sometimes causing ice build-up).  When the disturbed moisture rolls off the wings, it mixes with other moisture in the air, condensing into a cloud-like substance, resulting in the white line you see from the ground.
500353
sud is composed of very tiny bubbles of soap, which diffract light in all different directions, the light rays interfere and give rise to all colours, which produces white light. for the same reason snow is white, not by tiny bubbles, but by tiny crystals.
25339
Air temperature may be several degrees warmer than ice surface temperature. Light, including infrared or warmth, is reflected from white surfaces.\n\nThe surface of the ice will melt, slowly, during the day, but it will freeze again over night. That's one of the reasons why a snow field slowly turns into ice.
917405
You mean white, right? Snow reflects light and light's prism makes white, so when the snowflakes change shape into water, they no longer reflect or refract.
307502
well you know its ice melting, ice is white cos its reflecting all the colors in the sun's light rays. If it absorbed those then snow would be black.\n\nbut if you already knew that, then the real answer is the snow queen takes the white away when the snow melts and uses it to paint her castle.
111033
There is no national standard as to the color of emergency vehicles.  That is entirely a local decision.\n\nThere is, however, a standard for the colors of flashers.  Fire and ambulance are red.  Law enforcement is red and blue.  Warning flashers for other emergency vehicles (i.e. tow trucks, utility vehicles, community police, private security) are yellow.
1173983
So they are easily seen.  Most Post-it pads are stuck on white papers to furnish additional information.  If they were also white, they would not stand out and see easily seen.  Yellow is any color of light that stimulates both the red and green cone cells of the retina and therefore it "catches you eyes". That is why you see so much yellow in the transportation industry.  Such as Yellow lines on the sides of roads and yellow school buses.\n \nThe majority of Post-it are yellow, but now come in many "designer" colors.
209839
I think because different parts of the country still have snow and ice, while others are in the real spring and summer...\nIt just depends on where you live...
482245
the truth behind youre question is the government has a color code for these things and honestly that just happens to be the color picked for this
1025463
The "Optic Yellow" color is intended to have the best overall visibility. Some argue that orange is more visible in certain conditions, but it doesn't show up well on TV, so it won't be adopted for many pro events.