🛣️Secondary Highway

National Highway 310C (NH 310C)

Chungtham to Tso Lhamo — 100.0 km

NH 310C is a secondary/branch national highway connecting Chungtham to Tso Lhamo, spanning 100.0 km through Sikkim. It branches from NH 10.

100.0

Kilometres

State

Major Cities

NH 10

Parent Highway

NH 310C Route Map

NH310A near Chungtham, Lachen, Thangu Valley, Gurudongmar, Tso Lhamo.

States & Union Territories

NH 310C passes through the following 1 state:

Sikkim

Major Cities & Towns Along NH 310C

The highway passes through 5 major cities and towns:

●Chungtham→●Lachen→●Thangu Valley→●Gurudongmar→●Tso Lhamo.

View on Google Maps

NH 310C Start and End Point

Start Point (Origin)

Chungtham

Junction point from route description

End Point (Terminus)

Tso Lhamo

Junction point from route description

Highway Classification

Highway NumberNH 310C

TypeSecondary/Branch Highway

Parent HighwayNH 10

Total Length100.0 km

Numbering SystemPost-2010 (New)

Managed ByNHAI / MoRTH

Speed Limit on NH 310C

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 310C

⚠️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 310C pass through?

National Highway 310C passes through Sikkim.

What are the major cities on National Highway 310C?

The major cities and towns along National Highway 310C include Chungtham, Lachen, Thangu Valley, Gurudongmar, Tso Lhamo..

What is the total length of National Highway 310C?

The total length of National Highway 310C is 100.0 km.

Is National Highway 310C a primary or secondary national highway?

National Highway 310C is a secondary/branch national highway that branches from NH 10.

What is the speed limit on National Highway 310C?

The speed limit on National Highway 310C 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 310C? (Route Map)

National Highway 310C follows this route: NH310A near Chungtham, Lachen, Thangu Valley, Gurudongmar, Tso Lhamo..

Planning a Road Trip on NH 310C?

Check out our road safety guides and highway speed limits.

Road Safety Rules Highway Speed Limits Road Trip Checklist