🛣️Secondary Highway

National Highway 310A (NH 310A)

NH310 to Kataola — 144.6 km

NH 310A is a secondary/branch national highway connecting NH310 to Kataola, spanning 144.6 km through Sikkim. It branches from NH 10.

144.6

Kilometres

State

Major Cities

NH 10

Parent Highway

NH 310A Route Map

NH310 at Tashiview point, Phodang, Mangan, Lachung, Kataola

States & Union Territories

NH 310A passes through the following 1 state:

Sikkim

Major Cities & Towns Along NH 310A

The highway passes through 5 major cities and towns:

●at Tashiview point→●Phodang→●Mangan→●Lachung→●Kataola

View on Google Maps

NH 310A Start and End Point

Start Point (Origin)

NH310

Junction point from route description

End Point (Terminus)

Kataola

Junction point from route description

Highway Classification

Highway NumberNH 310A

TypeSecondary/Branch Highway

Parent HighwayNH 10

Total Length144.6 km

Numbering SystemPost-2010 (New)

Managed ByNHAI / MoRTH

Speed Limit on NH 310A

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 310A

⚠️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 310A pass through?

National Highway 310A passes through Sikkim.

What are the major cities on National Highway 310A?

The major cities and towns along National Highway 310A include at Tashiview point, Phodang, Mangan, Lachung, Kataola.

What is the total length of National Highway 310A?

The total length of National Highway 310A is 144.6 km.

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

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

What is the speed limit on National Highway 310A?

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

National Highway 310A follows this route: NH310 at Tashiview point, Phodang, Mangan, Lachung, Kataola.

Planning a Road Trip on NH 310A?

Check out our road safety guides and highway speed limits.

Road Safety Rules Highway Speed Limits Road Trip Checklist