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🛣️Secondary Highway

National Highway 431 (NH 431)

Phatuha to Barh — 70.0 km

NH 431 is a secondary/branch national highway connecting Phatuha to Barh, spanning 70.0 km through Bihar. It branches from NH 31.

70.0

Kilometres

1

State

4

Major Cities

NH 31

Parent Highway

NH 431 Route Map

(NH30A) NH31 near Phatuha, Chandi, Harnaut, NH31 near Barh

States & Union Territories

NH 431 passes through the following 1 state:

Bihar

Major Cities & Towns Along NH 431

The highway passes through 4 major cities and towns:

●Phatuha→●Chandi→●Harnaut→●Barh
View on Google Maps

NH 431 Start and End Point

Start Point (Origin)

Phatuha

Junction point from route description

End Point (Terminus)

Barh

Junction point from route description

Highway Classification

Highway NumberNH 431
TypeSecondary/Branch Highway
Parent HighwayNH 31
Total Length70.0 km
Numbering SystemPost-2010 (New)
Managed ByNHAI / MoRTH

Speed Limit on NH 431

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 431

  • ⚠️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 431 pass through?
National Highway 431 passes through Bihar.
What are the major cities on National Highway 431?
The major cities and towns along National Highway 431 include Phatuha, Chandi, Harnaut, Barh.
What is the total length of National Highway 431?
The total length of National Highway 431 is 70.0 km.
Is National Highway 431 a primary or secondary national highway?
National Highway 431 is a secondary/branch national highway that branches from NH 31.
What is the speed limit on National Highway 431?
The speed limit on National Highway 431 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 431? (Route Map)
National Highway 431 follows this route: (NH30A) NH31 near Phatuha, Chandi, Harnaut, NH31 near Barh.

Planning a Road Trip on NH 431?

Check out our road safety guides and highway speed limits.

Road Safety RulesHighway Speed LimitsRoad Trip Checklist

Related National Highways

NH 31

Unnao → Gazole

991.9 km
North India, East India

NH 131

132.0 km

NH 131A

NH 131B

NH 131G

NH 231

196.0 km

Other National Highways in Bihar

NH 19

Agra → Dankuni

NH 20

Bakhtiyarpur → Panikoili

NH 22

Sonbarsa → Lohardaga

NH 27

Porbandar → Silchar

NH 31

Unnao → Gazole

NH 33

Arwal → Farakka

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