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🛣️Secondary Highway

National Highway 179B (NH 179B)

Tindivadnam to Chennai — 116.0 km

NH 179B is a secondary/branch national highway connecting Tindivadnam to Chennai, spanning 116.0 km through Tamil Nadu. It branches from NH 79.

116.0

Kilometres

1

State

5

Major Cities

NH 79

Parent Highway

NH 179B Route Map

NH77 near Tindivadnam, Melmaruvuthur, Chengalpattu, NH48 near Poonamallee, Chennai

States & Union Territories

NH 179B passes through the following 1 state:

Tamil Nadu

Major Cities & Towns Along NH 179B

The highway passes through 5 major cities and towns:

●Tindivadnam→●Melmaruvuthur→●Chengalpattu→●Poonamallee→●Chennai
View on Google Maps

NH 179B Start and End Point

Start Point (Origin)

Tindivadnam

Junction point from route description

End Point (Terminus)

Chennai

Junction point from route description

Highway Classification

Highway NumberNH 179B
TypeSecondary/Branch Highway
Parent HighwayNH 79
Total Length116.0 km
Numbering SystemPost-2010 (New)
Managed ByNHAI / MoRTH

Speed Limit on NH 179B

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 179B

  • ⚠️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 179B pass through?
National Highway 179B passes through Tamil Nadu.
What are the major cities on National Highway 179B?
The major cities and towns along National Highway 179B include Tindivadnam, Melmaruvuthur, Chengalpattu, Poonamallee, Chennai.
What is the total length of National Highway 179B?
The total length of National Highway 179B is 116.0 km.
Is National Highway 179B a primary or secondary national highway?
National Highway 179B is a secondary/branch national highway that branches from NH 79.
What is the speed limit on National Highway 179B?
The speed limit on National Highway 179B 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 179B? (Route Map)
National Highway 179B follows this route: NH77 near Tindivadnam, Melmaruvuthur, Chengalpattu, NH48 near Poonamallee, Chennai.

Planning a Road Trip on NH 179B?

Check out our road safety guides and highway speed limits.

Road Safety RulesHighway Speed LimitsRoad Trip Checklist

Related National Highways

NH 79

Mettur Dam → Ulundurpettai

210.0 km
South India

NH 179A

140.0 km

NH 179D

119.0 km

Other National Highways in Tamil Nadu

NH 16

Chennai → Kolkata

NH 32

Chennai → Thoothukudi

NH 36

Vikravandi → Manamadurai

NH 38

Vellore → Thoothukudi

NH 42

Joladarasi → Krishnagiri

NH 44

Srinagar → Kanyakumari

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