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🛣️Secondary Highway

National Highway 178 (NH 178)

Anchetty to Hosur — 52.0 km

NH 178 is a secondary/branch national highway connecting Anchetty to Hosur, spanning 52.0 km through Tamil Nadu. It branches from NH 78.

52.0

Kilometres

1

State

3

Major Cities

NH 78

Parent Highway

NH 178 Route Map

NH78 near Anchetty, Denkanikottai, NH48 near Hosur

States & Union Territories

NH 178 passes through the following 1 state:

Tamil Nadu

Major Cities & Towns Along NH 178

The highway passes through 3 major cities and towns:

●Anchetty→●Denkanikottai→●Hosur
View on Google Maps

NH 178 Start and End Point

Start Point (Origin)

Anchetty

Junction point from route description

End Point (Terminus)

Hosur

Junction point from route description

Highway Classification

Highway NumberNH 178
TypeSecondary/Branch Highway
Parent HighwayNH 78
Total Length52.0 km
Numbering SystemPost-2010 (New)
Managed ByNHAI / MoRTH

Speed Limit on NH 178

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 178

  • ⚠️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 178 pass through?
National Highway 178 passes through Tamil Nadu.
What are the major cities on National Highway 178?
The major cities and towns along National Highway 178 include Anchetty, Denkanikottai, Hosur.
What is the total length of National Highway 178?
The total length of National Highway 178 is 52.0 km.
Is National Highway 178 a primary or secondary national highway?
National Highway 178 is a secondary/branch national highway that branches from NH 78.
What is the speed limit on National Highway 178?
The speed limit on National Highway 178 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 178? (Route Map)
National Highway 178 follows this route: NH78 near Anchetty, Denkanikottai, NH48 near Hosur.

Planning a Road Trip on NH 178?

Check out our road safety guides and highway speed limits.

Road Safety RulesHighway Speed LimitsRoad Trip Checklist

Related National Highways

NH 78

Naraharipeta → Anchetty

260.0 km
South India

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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