National Highway 138 (NH 138)
Written and checked byRamanathan Virli· Roads & Infrastructure
Tuticorin Port to Tirunelveli — 51.6 km
NH 138 is a secondary/branch national highway connecting Tuticorin Port to Tirunelveli, spanning 51.6 km through Tamil Nadu. It branches from NH 38.
51.6
Kilometres
1
State
2
Major Cities
NH 38
Parent Highway
NH 138 Route Map
(NH7A) NH38 near Tuticorin Port, NH44 near Tirunelveli
States & Union Territories
NH 138 passes through the following 1 state:
Major Cities & Towns Along NH 138
The highway passes through 2 major cities and towns:
NH 138 Start and End Point
Start Point (Origin)
Tuticorin Port
End Point (Terminus)
Tirunelveli
Highway Classification
Speed Limit on NH 138
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 138
- ⚠️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 138 start and end?
Which states does National Highway 138 pass through?
What are the major cities on National Highway 138?
What is the total length of National Highway 138?
Is National Highway 138 a primary or secondary national highway?
What is the speed limit on National Highway 138?
What is the route of National Highway 138? (Route Map)
Planning a Road Trip on NH 138?
Check out our road safety guides and highway speed limits.
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