National Highway 177A (NH 177A)
Written and checked byRamanathan Virli· Roads & Infrastructure
Tiruvannamalai to Panruti Cuddalore — 117.0 km
NH 177A is a secondary/branch national highway connecting Tiruvannamalai to Panruti Cuddalore, spanning 117.0 km through Tamil Nadu. It branches from NH 77.
117.0
Kilometres
1
State
4
Major Cities
NH 77
Parent Highway
NH 177A Route Map
NH77 near Tiruvannamalai, Thirukoilur, Arasur, Panruti Cuddalore
States & Union Territories
NH 177A passes through the following 1 state:
Major Cities & Towns Along NH 177A
The highway passes through 4 major cities and towns:
NH 177A Start and End Point
Start Point (Origin)
Tiruvannamalai
End Point (Terminus)
Panruti Cuddalore
Highway Classification
Speed Limit on NH 177A
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 177A
- ⚠️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 177A start and end?
Which states does National Highway 177A pass through?
What are the major cities on National Highway 177A?
What is the total length of National Highway 177A?
Is National Highway 177A a primary or secondary national highway?
What is the speed limit on National Highway 177A?
What is the route of National Highway 177A? (Route Map)
Planning a Road Trip on NH 177A?
Check out our road safety guides and highway speed limits.
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