🛣️Secondary Highway

National Highway 312B (NH 312B)

Malancha to Budge Budge — 71.5 km

NH 312B is a secondary/branch national highway connecting Malancha to Budge Budge, spanning 71.5 km through West Bengal. It branches from NH 12.

71.5

Kilometres

State

Major Cities

NH 12

Parent Highway

NH 312B Route Map

NH312A near Malancha, EM Bypass at Kolkata, Alipore, Maheshtala, Budge Budge

States & Union Territories

NH 312B passes through the following 1 state:

West Bengal

Major Cities & Towns Along NH 312B

The highway passes through 5 major cities and towns:

●Malancha→●EM Bypass at Kolkata→●Alipore→●Maheshtala→●Budge Budge

View on Google Maps

NH 312B Start and End Point

Start Point (Origin)

Malancha

Junction point from route description

End Point (Terminus)

Budge Budge

Junction point from route description

Highway Classification

Highway NumberNH 312B

TypeSecondary/Branch Highway

Parent HighwayNH 12

Total Length71.5 km

Numbering SystemPost-2010 (New)

Managed ByNHAI / MoRTH

Speed Limit on NH 312B

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 312B

⚠️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 312B pass through?

National Highway 312B passes through West Bengal.

What are the major cities on National Highway 312B?

The major cities and towns along National Highway 312B include Malancha, EM Bypass at Kolkata, Alipore, Maheshtala, Budge Budge.

What is the total length of National Highway 312B?

The total length of National Highway 312B is 71.5 km.

Is National Highway 312B a primary or secondary national highway?

National Highway 312B is a secondary/branch national highway that branches from NH 12.

What is the speed limit on National Highway 312B?

The speed limit on National Highway 312B 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 312B? (Route Map)

National Highway 312B follows this route: NH312A near Malancha, EM Bypass at Kolkata, Alipore, Maheshtala, Budge Budge.

Planning a Road Trip on NH 312B?

Check out our road safety guides and highway speed limits.

Road Safety Rules Highway Speed Limits Road Trip Checklist