National Highways in Assam
37 national highways pass through Assam, 9 of them primary routes. Each entry below links to that highway's full route, start and end points, and the states it crosses.
37
Highways
9
Primary NHs
11,602
Total route km
NH 2Primary
Dibrugarh → Siaha
NH 6Primary
Jorabat → Zokhawthar
NH 8Primary
Karimganj → Maitri Setu
NH 13Primary
Tawang → Wakro
NH 15Primary
Baihata → Wakro
NH 17Primary
Guwahati → Sevoke
NH 27Primary
Porbandar → Silchar
NH 29Primary
Dabaka → Jessami
NH 37Primary
Karimganj → Imphal
NH 115
Dum Duma → Roing
NH 117
North Salmara → Bijni
NH 117A
Bilasipara → Garubhasa
NH 117B
Agia → Meghalaya
NH 127
Nagaon → Kaliabor
NH 127A
NH 127B
Srimrampur → Nongston
NH 127C
NH 127D
NH 127E
Barama → Indo/Bhutan border
NH 129
Dimapur → Numaligarh
NH 208A
NH 208 → Chand Khera
NH 215
Mahadevpur → Dibrugarh
NH 217
Paikan → Dudhnai
NH 306
Kolasib → Silchar
NH 315
Makum → border
NH 315A
Khonsa → Tinsukia
NH 415
Ghopur → Banderdeva
NH 427
Howli → Amingaon
NH 515
Kulajan → Pasighat
NH 627
Nelle → Harangajao
NH 627A
NH 627B
Bai Thanglangso → Amoni/Ahmoni
NH 627C
Dongkamukam → Bokolia
NH 702
Chantongia → Sapekhati
NH 702C
Sibasagar → Sonari
NH 702D
Mokokchung → Jorhat
NH 715
Tejpur → Jhanji
Frequently asked questions
How many national highways pass through Assam?
37 national highways run through Assam, of which 9 are primary (single- or double-digit) national highways and the rest are branch or spur routes.
Which is the longest national highway in Assam?
Among the highways passing through Assam, NH 27 is the longest at 3507 km, running from Porbandar to Silchar. Note that this is the highway's full length across all states it passes through, not only the portion inside Assam.
What is the speed limit on national highways in Assam?
On national highways the default limit notified by the Ministry of Road Transport & Highways is 100 km/h for cars on four-lane and wider divided carriageways, 80 km/h on undivided highways, and 80 km/h for light goods vehicles. State authorities and NHAI can notify lower limits on specific stretches, and the signposted limit always overrides the default.