| National Highways ( NH ) of passing through Assam |
| NH | Route |
| 31 | From W.B. Border - Gouripur - North Salmara - Bijni - Charaliamingaon Junction with NH No.37 |
| 31B | North Salmaria - Junction with NH No37 near Jogighopa |
| 31C | From W.B. Border - Kochugaon - Sidli Jn. With NH31 near Bijni |
| 36 | Nagaon - Dabaka - Amlakhi - Nagaland Border |
| 37 | Junction with NH No.31B near Goalpara - Paikan - Guwahati - Dispur - Nowgaon - Numaligarh - Jorhat - Jhanzi - Dibrugarh - Tinsukia - Makum - Saikhoaghat |
| 37A | Kuwari Tal - Junction with NH.No.52 near Tezpur |
| 38 | Makum - Ledo - Lekhapani |
| 39 | Numaligarh - Naojan - Bokajan up to Nagaland Border |
| 44 | From Meghalaya Border - Badarpur - Karimganj - Patharkandi up to Tripura Border |
| 51 | Paikan up to Meghalaya Border |
| 52 | Baihata - Charali - Mangaldai - Dhekiajuli - Tezpur - Gohpur - Bander Dewa - North Lakhimpur - Dhemaji - Kulajan - Arunachal Border - Junction with NH No.37 near Saikhoaghat |
| 52A | Gohpur - A.P. Border - Bander Dewa |
| 52B | Kulajan - Dibrugarh |
| 53 | Junction with NH44 near Badarpur - Silchar - Lakhipur up to Manipur Border. |
| 54 | Dabaka - Lumding - Langting - Hablong - Silchar - Dwarband up to Mizoram Border |
| 61 | Jhanzi - Amguri - Nagaland border |
| 62 | Dudhnai - Damara up to Meghalaya Border |
| 151 | Karimganj - Bangladesh Border |
| 152 | Patacharkuchi - Hajua - Bhutan Border |
| 153 | Ledo - Lekhapani - Arunachal Pradesh Border |
| 154 | Dhaleshwar (Badarpur) - Bhairabhi - Mizoram Border |