Australia`s Highway 1 is the longest national highway in the world at over 14,500 km (9,000 mi).
* Longest international highway: the Pan-AmericanHighway, which connects many countries in the Americas, is nearly 48,000 kilometres (29,826 mi) long as of 2005.
The longest international highway in the world is the Pan American highway. It connects many countries in the Americas and is almost 25,000km long. The longest national highway (point to point) is the Trans- Canada Highway, which is 7,821km long. This highway runs east-west across southern Ontario. It starts in Newfoundland on the east coast and ends in British Columbia on the west coast. The longest national highway (circuit) is Australia's Highway 1, which is over 20,000 km long. This highway runs almost the entire way around the continents coastline connecting most of the major cities.
In Italy, the first highway is established in 1924.
The world's longest national highway is the Trans-Canada Highway that runs across Canada from Victoria, British Columbia to and St. John's, Newfoundland covering 7,821 kilometers or 4,860 miles.
About 8000 km,,
The longest highway in the Philippines is the Pan-Philippine Highway (aka Maharlika Highway).
I 90 is the longest highway in the u.s.a
It is the Pan American Highway with its 27197 miles
Longest interstate highway is I-90.
The longest state highway in Nebraska is Route 92.
The longest state highway in NJ is Route 47.