🛣️Secondary Highway

National Highway 315A (NH 315A)

Khonsa to Tinsukia — 158.0 km

NH 315A is a secondary/branch national highway connecting Khonsa to Tinsukia, spanning 158.0 km through Arunachal Pradesh, Assam. It branches from NH 15.

158.0

Kilometres

States

Major Cities

NH 15

Parent Highway

NH 315A Route Map

NH215 near Khonsa, Hukanjuri, Nahorkatia, NH15 near Tinsukia

States & Union Territories

NH 315A passes through the following 2 states:

Arunachal PradeshAssam

Major Cities & Towns Along NH 315A

The highway passes through 4 major cities and towns:

●Khonsa→●Hukanjuri→●Nahorkatia→●Tinsukia

View on Google Maps

NH 315A Start and End Point

Start Point (Origin)

Khonsa

Junction point from route description

End Point (Terminus)

Tinsukia

Junction point from route description

Highway Classification

Highway NumberNH 315A

TypeSecondary/Branch Highway

Parent HighwayNH 15

Total Length158.0 km

Numbering SystemPost-2010 (New)

Managed ByNHAI / MoRTH

Speed Limit on NH 315A

Cars, Jeeps & Light Motor Vehicles100 km/h

Buses & Goods Carriers (medium)80 km/h

Heavy Motor Vehicles (trucks, lorries)60 km/h

Motorcycles & Two-Wheelers80 km/h

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 315A

⚠️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

Which states does National Highway 315A pass through?

National Highway 315A passes through Arunachal Pradesh, Assam.

What are the major cities on National Highway 315A?

The major cities and towns along National Highway 315A include Khonsa, Hukanjuri, Nahorkatia, Tinsukia.

What is the total length of National Highway 315A?

The total length of National Highway 315A is 158.0 km.

Is National Highway 315A a primary or secondary national highway?

National Highway 315A is a secondary/branch national highway that branches from NH 15.

What is the speed limit on National Highway 315A?

The speed limit on National Highway 315A is 100 km/h for cars and light motor vehicles, 80 km/h for buses and medium goods vehicles, and 60 km/h for heavy motor vehicles (trucks and lorries). These limits are set under the Central Motor Vehicles Rules for national highways. State governments may impose lower limits on specific sections.

What is the route of National Highway 315A? (Route Map)

National Highway 315A follows this route: NH215 near Khonsa, Hukanjuri, Nahorkatia, NH15 near Tinsukia.

Planning a Road Trip on NH 315A?

Check out our road safety guides and highway speed limits.

Road Safety Rules Highway Speed Limits Road Trip Checklist