<Dt> Longest international highway </Dt> <Dd> The Pan-American Highway, which connects many countries in the Americas, is nearly 25,000 kilometres (15,534 mi) long as of 2005 . The Pan-American Highway is discontinuous because there is a significant gap in it in southeastern Panama, where the rainfall is immense and the terrain is entirely unsuitable for highway construction . </Dd> <Dt> Longest national highway (point to point) </Dt> <Dd> Trans - Canada Highway has two routes, with the northern Route spanning 7,821 km (4,860 mi) long as of 2006 alone, and over 10,700 km long including the southern portion . The T.C.H. runs east - west across southern Canada, the populated portion of the country, and it connects many of the major urban centres along its route crossing almost all of the provinces, and reaching almost all of the capital cities . The T.C.H. begins on the east coast in Newfoundland, traverses that island, and crosses to the mainland by ferry . It reaches most of the Maritime Provinces of eastern Canada, and a side route using ferries traverses the province of Prince Edward Island . After crossing the two most populous provinces of Quebec and Ontario, the T.C.H. continues westward across Manitoba, Saskatchewan, Alberta, and British Columbia . After reaching Vancouver, B.C., on the Pacific Coast, there is a ferry route west to Vancouver Island and the provincial capital city of Victoria, B.C. </Dd>

Who built the first highway in the world