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the road has a hard surface so that it can be flat and easy to drive on
If the surface is rough/bumpy , the vehicle cant safely go as fast as it can on a smooth road. Also if the car is bouncing, it's aerodynamics will be disturbed causing more drag. Ground clearance also has to be increased on rough roads, causing more drag.
The "tar" on roads is a mixture of several asphaltic and hydrocarbon compounds. These become liquid or often at higher temperatures (over 150 F). This temperature can be approached due to sunlight on a hot day and the road tar will become soft. If the supplier has adulterated the tar with more liquid oils or used the wrong compind (say roofing tar the surface may become soft or even liqufy at ambient conditions.
The wet road surface has less friction as the water interacts with the rubber and acts somewhat like a lubricant
Its an illusion! LOL! :-)
Asphalt. Macadam is another common name for the process. To Macadamize something is to pave it with asphalt.
they were built with smooth rocks on the to top. Then on the side there were paths for people when solider were marching down the road.
Intersect
Inadequate shocks, and or suspension components that are usually on passenger cars that aren't designed to travel on any surface other than a smooth, paved surface.
roads and paths
History's Mysteries - 1998 Roman Roads Paths to Empire 5-10 was released on: USA: 2002
The question is "WERE there roads in the Persian empire". The simple answer is no, the Persians only had dirt paths they travelled on but not "roads" by definition being a paved path. The Romans invented roads.
Roads were not invented. They started as animal trails, then became the worn paths that people walked on. When people developed carts, they began to widen and improve those paths and the result was what we now call roads.
Approximately 2% of the total surface area of Britain is covered by roads.
chembakolli is connected to other places by small roads and paths
a book to stones do you uas to surace roads with
The Danube River and the Rhine River were natural paths for the Roman Roads to follow.