🛣️Northeast IndiaPrimary Highway

National Highway 15 (NH 15)

Baihata to Wakro — 664.0 km

NH 15 is a primary national highway connecting Baihata to Wakro, spanning 664.0 km through Arunachal Pradesh, Assam.

664.0

Kilometres

States

Major Cities

NH 15

Parent Highway

NH 15 Route Map

(NH52) Baihata-Charali, Mangaldai, Dhekiajui, Tezpur, Banderdeva, North Lakhimpur, (NH52B) Kulajan, (NH37) Dibrugarh, Tinsukia, (NH52) Rupai, Mahadevpur, Wakro

States & Union Territories

NH 15 passes through the following 2 states:

Arunachal PradeshAssam

Major Cities & Towns Along NH 15

The highway passes through 12 major cities and towns:

●Baihata-Charali→●Mangaldai→●Dhekiajui→●Tezpur→●Banderdeva→●North Lakhimpur→●Kulajan→●Dibrugarh→●Tinsukia→●Rupai→●Mahadevpur→●Wakro

View on Google Maps

NH 15 Start and End Point

Start Point (Origin)

Baihata

End Point (Terminus)

Wakro

Highway Classification

Highway NumberNH 15

TypePrimary National Highway

Total Length664.0 km

RegionNortheast India

Numbering SystemPost-2010 (New)

Managed ByNHAI / MoRTH

Speed Limit on NH 15

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 15

⚠️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 15 start and end?

National Highway 15 starts from Baihata and ends at Wakro, covering a total distance of 664.0 km.

Which states does National Highway 15 pass through?

National Highway 15 passes through Arunachal Pradesh, Assam.

What are the major cities on National Highway 15?

The major cities and towns along National Highway 15 include Baihata-Charali, Mangaldai, Dhekiajui, Tezpur, Banderdeva, North Lakhimpur, Kulajan, Dibrugarh, Tinsukia, Rupai, Mahadevpur, Wakro.

What is the total length of National Highway 15?

The total length of National Highway 15 is 664.0 km.

Is National Highway 15 a primary or secondary national highway?

National Highway 15 is a primary national highway in India's post-2010 numbering system.

What is the speed limit on National Highway 15?

The speed limit on National Highway 15 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 15? (Route Map)

National Highway 15 follows this route: (NH52) Baihata-Charali, Mangaldai, Dhekiajui, Tezpur, Banderdeva, North Lakhimpur, (NH52B) Kulajan, (NH37) Dibrugarh, Tinsukia, (NH52) Rupai, Mahadevpur, Wakro — starting at Baihata and ending at Wakro.

Planning a Road Trip on NH 15?

Check out our road safety guides and highway speed limits.

Road Safety Rules Highway Speed Limits Road Trip Checklist