National Highway 177 (NH 177)
Written and checked byRamanathan Virli· Roads & Infrastructure
Tiruvannamalai to Dharmapuri — 126.0 km
NH 177 is a secondary/branch national highway connecting Tiruvannamalai to Dharmapuri, spanning 126.0 km through Tamil Nadu. It branches from NH 77.
126.0
Kilometres
1
State
4
Major Cities
NH 77
Parent Highway
NH 177 Route Map
NH77 near Tiruvannamalai, Thanipadi, Harur, Dharmapuri
States & Union Territories
NH 177 passes through the following 1 state:
Major Cities & Towns Along NH 177
The highway passes through 4 major cities and towns:
NH 177 Start and End Point
Start Point (Origin)
Tiruvannamalai
End Point (Terminus)
Dharmapuri
Highway Classification
Speed Limit on NH 177
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 177
- ⚠️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
Where does National Highway 177 start and end?
Which states does National Highway 177 pass through?
What are the major cities on National Highway 177?
What is the total length of National Highway 177?
Is National Highway 177 a primary or secondary national highway?
What is the speed limit on National Highway 177?
What is the route of National Highway 177? (Route Map)
Planning a Road Trip on NH 177?
Check out our road safety guides and highway speed limits.
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