Question

What is the name of the network of highways that connects the four major cities of India – Chennai, Kolkata, Delhi and Mumbai?

Answer 1

hope its helps!!!
YAMUNA EXPRESSWAY

Answer 2

Golden Quadrilateral, is the right answer.

This highway connects India's top four metropolitan cities of India most commonly known as Delhi, Mumbai, Chennai and Kolkata, forming a Quadrilateral. Being the largest highway project of India, the Golden Quadrilateral was initiated in the year 2001, as a  section of the National Highways Development Project (NHDP).  5,846km is the overall expansion of the quadrilateral, which consists of four / six-lane high-speed highways.