Indian highways are essential parts of the transportation system because they help to maintain communication between different states. While highways are essential to travel across India, there are certain things you need to know before stepping into one to have a safe and comfortable journey.

Running from west to east direction, NH 31 crosses through 3 different states of India. This National Highway connects several major cities across these states.

All highways are numbered in ascending order from east to west and all highways connecting east and west have been given odd numbers, and therefore NH 31. There are some of the states that this highway covers while following its specific route.

National Highway 31 runs through 3 states, which are: 

• Uttar Pradesh
• Bihar
• West Bengal. 

Many important cities across the three states are connected via this highway.

The entry point of the National Highway 31 is the junction of NH 27 in Unnao and the exit point is near the junction of NH 12 in Pandua, West Bengal.

All of these highways are built with certain infrastructures, and depending on that, here is a list of the types of vehicles allowed on NH 31:

• M1 category vehicles (Maximum 8-seater including the driver)
• M2 and M3 Category vehicles (9-seater or more including the driver)
• Category N vehicles (Goods carriages)
• Quadricycle
• Motorcycles
• 3-wheeled Vehicles 

All vehicles, such as cars, buses, trucks and other vehicles which fall under these categories are allowed on National Highway 31.

 The speed limits set for each vehicle are:

• Motorcycles: 80 km per hour
• Quadricycle: 60 km per hour
• Three-wheeled vehicles: 50 km per hour
• Motor vehicles with not more than eight seats in addition to the driver’s seat used to carry passengers: 100 km per hour
• Motor vehicles having nine or more seats in addition to the driver’s seat used to carry passengers: 90 km per hour
• Motor vehicles used to carry goods: 80 km per hour

Every vehicle should abide by these guidelines to ensure their own and other travellers' safety on the roads.

While travelling by NH 31 routes, you can enjoy the road trip further by visiting some of the places around. There are a few places in all 3 states to consider while driving through this national highway.

1. Uttar Pradesh

Here are some of the places you can visit while travelling through NH 31:

• Badarka Fort (Unnao)
• Lord Cornwallis Tomb (Ghazipur)

2. Bihar

Here are a few famous places that you can visit while travelling through routes of National Highway thirty-one:

• Bakhtiyarpur Beach
• Ambika Bhawani Temple Aami (Chhapra)

3. West Bengal

These are a few places to visit near NH 31 in the state of West Bengal:

• Malda Museum

Here are a few tips before you start your journey on national highway 31:

• As NH 31 travels through some of the most rugged plains, it is advised to drive carefully, especially while crossing the terrains between Bihar and West Bengal. 
• Try not to overtake while driving to prevent any accidents on the way as the route of National Highway 31 is quiet congested.
• Use proper indicators while changing narrow lanes and aide by the traffic signals to avoid accidents pn this route.

These are a few tips to ensure the safety of you and others on the highways.