Asian Highways in Thailand by ECOCAR rent-a-car's Car Rental Thailand:
Asian Highway 1 (AH1)

One of the eight main routes of the Asian Highway Network in a total of 20,557 kilometers-long. It has been started from Tokyo, Japan to the Turkey-Bulgaria Border Post that joins European Route E80. In parts of Thailand, it has been started since Amphoe Aranyaprathet, Sakaeo to Amphoe Mae Sot, Tak within a total of 695 kilometers-long. Those can consist of : 

Thailand Route 33: Amphoe Aranyaprathet, Sakaeo - Amphoe Nong Kae, Saraburi: 210 kilometers

Thailand Route 1 (Phaholyothin Road): Nong Kae, Saraburi - Bang Pa-in, Ayutthaya: 40 kilometers 

Thailand Route 32: Amphoe Bang Pa-in, Ayutthaya - Amphoe Manorom, Chainat: 149 kilometers 

Thailand Route 1 (Phaholyothin Road): Amphoe Manorom, Chainat - Tak: 210 kilometers 

Thailand Route 12: Tak - Mae Sot: 86 kilometers 

Asian Highways in Thailand by ECOCAR rent-a-car's Car Rental Thailand:
Asian Highway 2 (AH2)

One of the eight main routes of the Asian Highway Network in a total of 13,107 kilometers-long. It has been started from Singapore - Johor Causeway, Malaysia to Khosravi, Iran IR that is the border post with Iraq. In parts of Thailand, it has been started since Amphoe Sadao at Thailand-Malaysia Border Post to Amphoe Mae Sai at Thailand-Myanmar Border Post within a total of 1,923 kilometers-long. ECOCAR rent-a-car's Car Rental Thailand can tell that it is the longest Asian Highway route in Thailand. Those can consist of : 

Thailand Route 4 (Phetkasem Road): Amphoe Sadao, Songkhla - Phatthalung: 133 kilometers

Thailand Route 41: Phatthalung - Chumphon: 383 kilometers 

Thailand Route 4 (Phetkasem Road): Chumphon - Amphoe Pranburi, Prachuap Khirikhan: 250 kilometers 

Thailand Route 37: Amphoe Pranburi, Prachuap Khirikhan - Amphoe Cha-am, Phetchaburi: 47 kilometers

Thailand Route 4 (Phetkasem Road): Amphoe Cha-am, Phetchaburi - Amphoe Nakhon Chaisi, Nakhon Pathom: 153 kilometers

Thailand Route 338: Amphoe Nakhon Chaisi, Nakhon Pathom - BKK Outer Ring (Tawee Wattana): 24 kilometers

Thailand Highway 9: BKK Outer Ring (Tawee Wattana) - Amphoe Bang Pa-in, Ayutthaya: 103 kilometers

Thailand Route 32: Amphoe Bang Pa-in, Ayutthaya - Amphoe Manorom, Chainat: 145 kilometers

Thailand Route 1 (Phaholyothin Road): Amphoe Manorom, Chainat - Amphoe Mae Sai, Chiang Rai: 685 kilometers

Asian Highways in Thailand by ECOCAR rent-a-car's Car Rental Thailand:
Asian Highway 3 (AH3)

One of the eight main routes of the Asian Highway Network in a total of 7,331 kilometers-long. It has 2 sections both as Ulan Ude, Russia to Tanggu, China and Shanghai, China to Chiang Rai, Thailand-Chiang Tung, Myanmar. In parts of Thailand, it has been started since Fourth Thai–Lao Friendship Bridge, Amphoe Chiang Khong to Amphoe Muang Chiang Rai in a total of 118 kilometers-long. Those can consist of :

Thailand Route 1152: Fourth Thai–Lao Friendship Bridge, Amphoe Chiang Khong: 5 kilometers

Thailand Route 1020: Amphoe Chiang Khong to Amphoe Muang Chiang Rai: 113 kilometers

Asian Highways in Thailand by ECOCAR rent-a-car's Car Rental Thailand:
Asian Highway 12 (AH12)

This is one of eleven main routes of the Asian Highway Network in the South East Asia region with a total of 1,195 kilometers-long. It has been started from Laos DPR to Amphoe Nong Khae, Saraburi, Thailand. In parts of Thailand, it has been started since Nong Khai to Amphoe Nong Khae, Saraburi in a total of 538 kilometers-long. Those can consist of : 

Thailand Route 2 (Mittraphap Road): Nong Khai - Saraburi: 515 kilometers 

Thailand Route 1 (Phaholyothin Road): Saraburi - Amphoe Nong Khae: 23 kilometers

Asian Highways in Thailand by ECOCAR rent-a-car's Car Rental Thailand:
Asian Highway 13 (AH13)

One of eleven main routes of the Asian Highway Network in the South East Asia region with a total of 760 kilometers-long. It has been started from Laos DPR to Nakhon Sawan, Thailand. In parts of Thailand, it has been started since Thailand-Laos Border Post at Amphoe Chaloem Prakiat, Nan to Nakhon Sawan in a total of 558 kilometers-long. Those can consist of : 

Thailand Route 101: Amphoe Chaloem Prakiat, Nan - Amphoe Denchai, Phrae: 278 kilometers

Thailand Route 11: Amphoe Denchai, Phrae - Phitsanulok: 147 kilometers 

Thailand Route 117: Phitsanulok - Nakhon Sawan: 133 kilometers

Asian Highways in Thailand by ECOCAR rent-a-car's Car Rental Thailand:
Asian Highway 15 (AH15)

One of eleven main routes of the Asian Highway Network in the South East Asia region with a total of 534 kilometers-long. It has been started from the Central of Vietnam to Udon Thani, Thailand. In parts of Thailand, it has been started since Third Thai-Lao Friendship Bridge at Nakhon Phanom to Udon Thani in a total of 253 kilometers-long. Those can consist of : 

Thailand Route 295-Route 212: Third Thai-Lao Friendship Bridge - Nakhon Phanom: 13 kilometers 

Thailand Route 22: Nakhon Phanom - Sakon Nakhon - Udon Thani: 240 kilometers

Asian Highways in Thailand by ECOCAR rent-a-car's Car Rental Thailand:
Asian Highway 16 (AH16)

One of eleven main routes of the Asian Highway Network in the South East Asia region with a total of 1,031 kilometers-long. It has been started from Tak, Thailand to the Central of Vietnam. In parts of Thailand, it has been started since Tak to the west side as Mukdahan and Second Thai-Lao Friendship Bridge in a total of 720 kilometers-long. ECOCAR rent-a-car's Car Rental Thailand can tell that it is the longest Asian Highway sub-route in Thailand. Those can consist of :

Thailand Route 12: Tak - Mukdahan: 703 kilometers 

Thailand Route 212-Route 239: Mukdahan - Second Thai-Lao Friendship Bridge: 17 kilometers 

Asian Highways in Thailand by ECOCAR rent-a-car's Car Rental Thailand:
Asian Highway 18 (AH18)

One of eleven main routes of the Asian Highway Network in the South East Asia region with a total of 1,002 kilometers-long. It has been started from Amphoe Hatyai-Songkhla, Thailand to Johor Bahru, Malaysia. In parts of Thailand, it has been started since Hatyai to the east coast side of the Gulf of Thailand both as Pattani-Narathiwat and Thailand-Malaysia Border Post at Amphoe Sungai Kolok in a total of 263 kilometers-long. ECOCAR rent-a-car's Car Rental Thailand can tell that it is the only Asian Highway sub-route in Southern Thailand because most of all are located in the North Eastern area. Those can consist of :

Thailand Route 43: Amphoe Hatyai, Songkhla - Amphoe Nong Chik, Pattani: 87 kilometers

Thailand Route 42: Nong Chik, Pattani - Thailand-Malaysia Border Post at Sungai Kolok: 176 kilometers

Asian Highways in Thailand by ECOCAR rent-a-car's Car Rental Thailand:
Asian Highway 19 (AH19)

One of the eleven main routes of the Asian Highway Network in the South East Asia region. A total of 404 kilometers-long which has been started only in Thailand from Nakhon Ratchasima to Bangkok. ECOCAR rent-a-car's Car Rental Thailand can tell that it is the most economic route in Thailand. Those can consist of :

Thailand Route 304: Nakhon Ratchasima - Phanom Sarakham, Chachoengsao: 193 kilometers 

Thailand Route 331: Phanom Sarakham, Chachoengsao - Laem Chabang, Chonburi: 111 kilometers 

Thailand Motorway No.7: Laem Chabang, Chonburi - Sri Nakarintra Rd, Bangkok: 100 kilometers

Asian Highways in Thailand by ECOCAR rent-a-car's Car Rental Thailand:
Asian Highway 121 (AH121)

The Highway has come from ASEAN (Association of South East Asian Nations) which has been started since Mukdahan to Sakaeo in a total of 458 kilometers-long. 

Asian Highways in Thailand by ECOCAR rent-a-car's Car Rental Thailand:
Asian Highway 123 (AH123)

The Highway has come from ASEAN (Association of South East Asian Nations) which has been started since Thailand-Myanmar Border Post at Kanchanaburi to Thailand-Cambodia Border Post at Khlong Yai, Trat in a total of 643 kilometers-long. 

All in all, these are Asian Highways in Thailand. For your choice who needs to travel, you can contact ECOCAR rent-a-car's Car Rental Bangkok in 6 branches and other 4 provincial branches as Chiang Mai, Ubon Ratchathani, Pattaya and Hatyai for your car rental trips to go round the Land of Smile.