National Highway 31 (India)

National highway 31 transits 1,047 kilometres (651 mi) across three states of India in east - west direction.

Uttar Pradesh

Unnao, Lalganj, Raebareli, Salon, Pratapgarh, Machhlishahr, Jaunpur, Babatpur, Varanasi, Ghazipur, Ballia, Suraimanpur

Bihar

Chhapra, Hajipur, Patna, Bakhtiyarpur, Barh, Mokama, Barauni, Begusarai, Khagaria, Naugachhia, kursela, korha, Katihar, maniyan, bastaul, pranpur, Labha,purnia,

West Bengal

Chandpur, Harishchandrapur, Tulsihata, Chanchal, Malatipur, Samsi, Akalpur, Kodubari Morh at Gazole.

Uttar Pradesh

NH 27 Terminal at Unnao

NH 335 near Lalganj

NH 30 near Raebareli

NH 931A near Salon

NH 731A near Pratapgarh

NH 931 near Pratapgarh

NH 330 near Pratapgarh

NH 319D near Mungra Badshahpur

NH 731 near Jaunpur

NH 135A near Jaunpur

NH 128A near Jaunpur

NH 28 near Varanasi

NH 24 near Ghazipur

NH 128D near Phephna

NH 727B near Ballia

Bihar

NH 922 near Buxar

NH 531 near Chhapra

NH 331 near Chhapra

NH 722 near Chhapra

NH 22 near Hajipur

NH 322 near Hajipur

NH 922 near Patna

NH 431 near Fatuha

NH 20 near Bakhtiyarpur

NH 431 near Barh

NH 33 near Mokama

NH 122 near Barauni

NH 333B near Munger

NH 231 near Maheshkhunt

NH 131 near Bihpur

NH 231 near Kora

NH 131A near Katihar

NH 131A in labha

West Bengal

NH 12 Terminal near Malda

SH 10 (WB) near Kodubari Morh in Gazole.

As per Satellite imagery from Google Maps, the national Highway 31 is being made 4 lane currently between Unnao & Raebareli, between Ghazipur & Ballia, between Bakhtiyarpur & Barauni, between Katihar & Labha. 4 lane Bypass is under construction between Labha & Harishchandrapur for bypassing Chandpur (West Bengal). 4 Lane bypass is under construction at Chanchal to bypass Chanchal Town bottleneck. Once these bypasses are built, the Highway length will shorten to 992.25 kilometres (616.56 mi) & reducing travel time. 4 lane stretch is already operational in patches between Raebareli & Ghazipur, between Hajipur & Bakhtiyarpur & between Katihar & Barauni.