Why are the roads in Maryland red?

They used a mixture with high amounts of Iron in them to create the road surface. In my part of maryland (Carroll County), most of the roads are black or grey. read more

My friend and I were driving through Maryland along I-68 E and I-70 E, and we noticed that there were parts of the roads that were a tint of red. read more

If the rocks and sand used for roads in that part of Wyoming have a reddish tint, the resulting road will share that color. In some places and instances, colored binders or a coating are used to give a road a certain hue, but this is usually for specialized purposes, such as bike lanes. read more