This article lists the world's longest road routes that are either officially numbered or otherwise known under a single name. Some of the roads may still be partially planned or under construction.
| Pan-American Highway | 30000km (20,000miles)[1] | Americas | Prudhoe Bay, Alaska, United States  | Puerto Montt or Quellón, Chile or Ushuaia, Argentina  | Longest road according to the Guinness Book of Records.[2] Incomplete at the Darién Gap, causing the northern and southern segments to be actually about 11,500 and 9,600 km long respectively. | |
| Asian Highway 1 | 20557km (12,774miles) | Eurasia | Kapıkule, Turkey  | Tokyo, Japan  | Broken up by the Sea of Japan. | |
| 14500km (9,000miles) | Australia | Loop route | Longest route within a single country by joining partial roads. Not a straight single road. | |||
| Asian Highway 2 | 13177km (8,188miles) | Asia | Denpasar, Indonesia  | Khosravi, Iran  | Broken up by Bali Strait, Java Sea, and Karimata Strait. | |
| Trans-Siberian Highway | 11000km (7,000miles) | Russia | St. Petersburg  | Vladivostok | Longest non-loop route within a single country. | |
| Tripoli–Cape Town Highway | 10808km (6,716miles) | Africa | Longest Trans-African highway. Large sections remain missing. | |||
| Asian Highway 6 | 10475km (6,509miles) | Eurasia | Busan, South Korea  | Belarusian border, Russia | ||
| Asian Highway 5 | 10380km (6,450miles) | Eurasia | Shanghai, China  | Bulgarian border, Turkey | ||
| Cairo–Cape Town Highway | 10228km (6,355miles) | Africa | Longest fully traversable Trans-African highway. | |||
| National Highway 219 | 10000km (10,000miles) | China | Kom-Kanas, Xinjiang | Dongxing, Guangxi | Longest route in China.Parts still under construction. | |
| Asian Highway 9 | 10000km (10,000miles) | Eurasia | St. Petersburg, Russia | Lianyungang | ||
| National Highway 331 | 9200km (5,700miles) | China | Dandong, Liaoning | Altay, Xinjiang | Parts still under construction. | |
| European route 40 | 8690km (5,400miles) | Eurasia | Calais, France  | Ridder, Kazakhstan  | Longest E-road. | |
| Cairo–Dakar Highway | 86360NaN0 | Africa | Part of Trans-African highway network | |||
| European route 60 | 8200km (5,100miles) | Eurasia | Brest, France | Irkeshtam, Kyrgyzstan  | ||
| National Highway 228 | 7800km (4,800miles)[3] | China | Dandong, Liaoning | Dongxing, Guangxi | Parts still under construction | |
| Trans-Canada Highway | 7476km (4,645miles) | Canada | Victoria and Haida Gwaii, British Columbia  | St. John's, Newfoundland and Labrador | Longest road route in Canada. | |
| Asian Highway 3 | 7331km (4,555miles) | Asia | Ulan-Ude, Russia | Chiang Rai, Thailand  | Divided into two unconnected sections. | |
| European route 45 | 5190km (3,230miles) | Europe | Alta, Norway  | Gela, Sicily, Italy  | Longest north–south European route. | |
| Golden Quadrilateral | 5846km (3,633miles) | India | Loop route in India  | Longest road route in India. | ||
| U.S. Route 20 | 5415km (3,365miles) | United States | Newport, Oregon | Boston, Massachusetts | Longest road in the United States.[4] | |
| Ruta Nacional 40 | 5194km (3,227miles) | Argentina | Cape Virgenes, Santa Cruz Province, Argentina | La Quiaca, Provincia de Jujuy | At km 4601 is the highest road outside the Himalayas with 5000 msal and the longest in South America. | |
| Interstate 90 | 4861km (3,020miles) | United States | Seattle, Washington | Boston, Massachusetts | Longest Expressway. | |
| BR-101 | 4658km (2,894miles) | Brazil | Touros-RN  | São José do Norte-RS | Longest highway in Brazil. | |
| National Highway 44 | 4658km (2,894miles) | Indian-administered Kashmir and India | Kanyakumari, Tamil Nadu | Longest national highway of India. | ||
| National Highway 27 | 3,507 km(2,179 mi) | India | Porbandar, Gujarat | Silchar, Assam | East - West National highway in India | |
| Chile Route 5 | 3364km (2,090miles) | Chile | Part of the Pan-American Highway. | |||
| Pan-Philippine Highway (AH26) | 3380km (2,100miles) | Philippines | Longest highway in Southeast Asia. | |||
| National route 1 | 3087km (1,918miles) | DR Congo | Longest national highway in Africa. | |||
| Name | Length | Location | From 1 | From 2 !Note | ||
|---|---|---|---|---|---|---|
| Interstate 90 | 4861km (3,020miles) | United States | Seattle, Washington | Boston, Massachusetts | Longest Interstate Highway in the United States | |
| Interstate 80 | 4666km (2,899miles) | United States | San Francisco, California | Teaneck, New Jersey | ||
| G30 Lianyungang–Khorgas Expressway | 4244km (2,637miles) | China | Lianyungang, Jiangsu | Khorgas, Xinjiang | Longest expressway in China | |
| Interstate 40 | 4119km (2,559miles) | United States | Barstow, California | Wilmington, North Carolina | ||
| Interstate 10 | 3960km (2,460miles) | United States | Santa Monica, California | Jacksonville, Florida | ||
| G6 Beijing–Lhasa Expressway | 3718km (2,310miles) | China | Beijing | Lhasa, Tibet | Sections between Nagqu and Golmud still incomplete | |
| G15 Shenyang–Haikou Expressway | 3710km (2,310miles) | China | Shenyang, Liaoning | Haikou, Hainan | ||
| G25 Changchun–Shenzhen Expressway | 3580km (2,230miles) | China | Changchun, Jilin | Shenzhen, Guangdong | ||
| Trans Sumatra Toll Road[5] | 2,818 km (1,751 mi) | Indonesia | Banda Aceh | Bakauheni | It is expected to be completed in 2024.[6] Length is the total planned network length. | |
| G7 Beijing–Ürümqi Expressway | 2540km (1,580miles)[7] | China | Beijing | Ürümqi, Xinjiang | ||
| Interstate 70 | 2151km (1,337miles) | United States | Cove Fort, Utah | Baltimore, Maryland | ||
| Pan-Borneo Highway[8] | 2083km (1,294miles) | Malaysia and Brunei | Telok Melano, Sarawak | Tawau, Sabah | The most dangerous road in Malaysia.[9] | |
| North–South expressway | 1941km (1,206miles) | Vietnam | Hanoi | Cần Thơ | Majority of the route still planned or under construction |