The following are the speed limits notified by the governor of Assam
| S. N. | Nature of Highway Strtech | Allowable Speed Limit (in km/hr) |
|---|---|---|
| 1 | NH stretches in plain with 7meter carriage way without paved Shoulders | 70 |
| 2 | NH stretches in plain with 7 meter carriage way with paved shoulders | 80 |
| 3 | 4-lane divided carriage way | 100 |
| 4 | In curves and in developed areas in all the above categories of NH | 40 |
| 5 | NHs in Town Areas | 40 |
| 6 | NHs in congested Town areas like Boko, Mirza, Gauripur, Chaigaon, Mangaldai, Kharupetia, Banderdewa and Moran | 20 |
| 7 | In Hill areas | 40 |
