National Highway 31 (NH 31)
Unnao to Gazole — 991.9 km
NH 31 is a primary national highway connecting Unnao to Gazole, spanning 991.9 km through Bihar, Uttar Pradesh, West Bengal.
991.9
Kilometres
3
States
15
Major Cities
NH 31
Parent Highway
NH 31 Route Map
(NH232A) NH27 near Unnao, (NH232) Lalganj, (NH231) Raebareli, Salon, Pratapgarh, Machhlishahr, (NH56) Jaunpur, (NH29) Varanasi, (NH19) Ghazipur, Ballia, Chhapra, (NH30) Hajipur, (NH31) Bakhtiyarpur, Mokama, Begusarai, Khagaria, Bihpur, Naugachia, Gosaingaon, Kursela, Kora, Katihar, Harishchanderpur, Tulsihata, Chanchal, Samsi, NH12 near Gazole.
States & Union Territories
NH 31 passes through the following 3 states:
Major Cities & Towns Along NH 31
The highway passes through 15 major cities and towns:
NH 31 Start and End Point
Start Point (Origin)
Unnao
End Point (Terminus)
Gazole
Highway Classification
Speed Limit on NH 31
Speed limits are prescribed under the Motor Vehicles Act and Central Motor Vehicles Rules for national highways. State governments may impose lower limits on specific stretches.
Safety Tips for Driving on NH 31
- ⚠️Always follow the speed limit — 100 km/h for cars and 80 km/h for heavy vehicles on national highways.
- ⚠️Wear seatbelts and ensure all passengers are buckled up.
- ⚠️Do not overtake on curves, bridges, or narrow sections.
- ⚠️Keep a safe following distance, especially during monsoon season.
- ⚠️Use headlights even during daytime on highways.
- ⚠️Take breaks every 2 hours during long drives to avoid fatigue.
- ⚠️In case of an emergency, call 112 (Unified Emergency Number) or 1033 (National Highway Helpline).
Frequently Asked Questions
Where does National Highway 31 start and end?
Which states does National Highway 31 pass through?
What are the major cities on National Highway 31?
What is the total length of National Highway 31?
Is National Highway 31 a primary or secondary national highway?
What is the speed limit on National Highway 31?
What is the route of National Highway 31? (Route Map)
Planning a Road Trip on NH 31?
Check out our road safety guides and highway speed limits.
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