Golden Quadrilateral: Route, map, distance, toll and features of India's key highway

The Golden Quadrilateral is a network of four national highways in India that connect the four major metro cities of Delhi, Mumbai, Chennai, and Kolkata in a quadrilateral (four-sided) configuration. It is one of the most important road projects in India, and it has played a significant role in the country's economic development. This is the longest highway project in the country and the 5th longest in the world.

The total length of the Golden Quadrilateral is about 5,800 kilometers (3,600 mi). The route starts from Delhi and goes north to NH 1 until it reaches Agra. It then turns south on NH 2 until it reaches Kolkata. From Kolkata, it takes NH 6 to Chennai. Finally, from Chennai, it travels west on NH 4 until it reaches Mumbai, and then north on NH 8 to complete the quadrilateral back to Delhi.

Here are the four arms of the Golden Quadrilateral and their distances.
Delhi–Kolkata: 1,453 km
Chennai–Mumbai: 1,290 km
Kolkata–Chennai: 1,684 km
Mumbai–Delhi: 1,419 km

The Golden Quadrilateral is a tolled highway. The toll rates vary depending on the type of vehicle and the distance traveled. However, the tolls have helped to improve the maintenance of the highway and to finance future expansion projects.

The Golden Quadrilateral is a four-lane or six-lane highway with a paved surface. It is designed to accommodate high volumes of traffic. The highway also has a number of rest stops, fuel stations, and other amenities for travelers.

The Indian government is planning to expand the Golden Quadrilateral by adding additional lanes and improving safety features. The government is also working on developing new east-west corridors to connect the Golden Quadrilateral with other parts of the country.