what is road density?

Answer 1

Jamie is right. Here is a little more info and a link where you can see a road density map:

"In fact, there are so many roads that a detailed regional map cannot be shown on a single page. Instead, the regional distribution of roads is indicated by using a coarse-scale indicator of relative road density. On this map, bright colors indicate places that have higher road density, and dark colors indicate places with lower road density. It is immediately apparent that roads are not distributed uniformly throughout the region; their locations are directly comparable to the maps of population, elevation, and land cover shown earlier. There are more roads in urban areas than in rural areas, and there are more roads in the eastern half of the region than in the western half."

Answer 2

It is a number indicating how thick or thin road distribution is in a region or area.

It is the ratio between the length of each roading in an are to the Total area. In other words, the Road dennsity of a particular area is calculated by diving the lemgth of each roading in that area by the total area. It can't be more than 1 as roads can't occupy all the area. It will be in decimals < 1. The higher this value in a place is, the denser is the roads there.

Generally, in rural areas, it will be less & in urban areas it will be more.
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Answer 3

It is the density of roading in a region, in which you get the length of roading in each area, divided by that area, and you get the density of the road.

Answer 4

How much the road is fiiled with cars!