Editing Road transport (section)

===Early roads===
[[Image:Metopa Columna lui Traian Constructie drum.jpg|thumb|right|Road construction, depicted on [[Trajan's Column]].]]
The first methods of road transport were [[horse]]s, [[ox]]en or even humans carrying goods over [[Soil|dirt tracks]] that often followed [[Game (food)|game]] [[trail]]. The [[Persian Empire|Persians]] later built a network of [[Royal Road]]s across their empire.

With the advent of the [[Roman Empire]], there was a need for armies to be able to travel quickly from one region to another, and the roads that existed were often muddy, which greatly delayed the movement of [[Roman army|large masses of troops]]. To resolve this issue, the Romans built solid and lasting roads. The [[Roman road]]s used deep roadbeds of crushed stone as an underlying layer to ensure that they kept dry, as the water would flow out from the crushed stone, instead of becoming mud in clay soils. The Islamic [[Caliphate]] later built [[Tarmacadam|tar-paved]] roads in [[Baghdad]].<ref>{{cite web|url=http://www.americanautomove.com/information/road-transportation-a-history-and-how-we-use-it-today/|title=Road Transportation – A History and How We Use it Today|date=30 August 2012|publisher=American Auto Move|access-date=12 September 2012|archive-date=9 September 2013|archive-url=https://web.archive.org/web/20130909103136/http://www.americanautomove.com/information/road-transportation-a-history-and-how-we-use-it-today/|url-status=live}}</ref>