Which is the longest road in the world?

a) The Pan-American Highway

b) Asian Highway 1

c) Highway 1

d) The Trans-Siberian Highway

The Pan-American Highway is the longest road in the world. It stretches from State of Alaska to south of Argentina and has a total length of about 50000 km (30000 miles). This highway crosses 14 different countries in North, South and Central America.