What is road tar made of?

Answer

Road tar is made from a mixture of hydrocarbons produced by processing crude oil or natural gas. Bitumen is the remnant of crude oil after the gasoline, kerosene, diesel oil and other fuels have been removed.

Bitumen is solid at low temperatures, but turns into a liquid at high temperatures. Tar is usually applied while hot so that it flows down into road cracks easily. Once cooled it turns into a semisolid substance. On days with a high ambient temperature tar becomes soft, and can become loose and pull away from the roads. This leads to the oil contained inside the tar being sprayed onto the lower panels of vehicles passing over them.

Q&A Related to "What is road tar made of?"
Road salt is made of salt. It is mined like table salt, but it is less pure. Road salt can be bad for the environment (groundwater, plants, animals) and so some areas do not salt
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Tar is a naturally occurring material with a nonspecific composition of metamorphosed organic debris (prehistoric wetlands and bogs, for example. The composition of one tar sample
http://wiki.answers.com/Q/What_is_tar_made_out_of
Roofing tar is traditionally a coal tar material. Thanks for using ChaCha!
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Tar is made of the residual products of petroleum refining. Natural tar (at the La Brea tar pits for example) is made up of Crude oil that has leaked close to the earths surface,
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