🛣️Secondary Highway

National Highway 166F (NH 166F)

Mahad to Raigad Fort — 28.3 km

NH 166F is a secondary/branch national highway connecting Mahad to Raigad Fort, spanning 28.3 km. It branches from NH 66.

28.3

Kilometres

States

Major Cities

NH 66

Parent Highway

NH 166F Route Map

NH66 near Mahad, Raigad Fort

Major Cities & Towns Along NH 166F

The highway passes through 2 major cities and towns:

●Mahad→●Raigad Fort

View on Google Maps

NH 166F Start and End Point

Start Point (Origin)

Mahad

Junction point from route description

End Point (Terminus)

Raigad Fort

Junction point from route description

Highway Classification

Highway NumberNH 166F

TypeSecondary/Branch Highway

Parent HighwayNH 66

Total Length28.3 km

Numbering SystemPost-2010 (New)

Managed ByNHAI / MoRTH

Speed Limit on NH 166F

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 166F

⚠️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

What are the major cities on National Highway 166F?

The major cities and towns along National Highway 166F include Mahad, Raigad Fort.

What is the total length of National Highway 166F?

The total length of National Highway 166F is 28.3 km.

Is National Highway 166F a primary or secondary national highway?

National Highway 166F is a secondary/branch national highway that branches from NH 66.

What is the speed limit on National Highway 166F?

The speed limit on National Highway 166F 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 166F? (Route Map)

National Highway 166F follows this route: NH66 near Mahad, Raigad Fort.

Planning a Road Trip on NH 166F?

Check out our road safety guides and highway speed limits.

Road Safety Rules Highway Speed Limits Road Trip Checklist