National Highway 4 (NH 4) is a major highway in India that connects the city of Mumbai in the west to Chennai in the south. It spans approximately 1,200 kilometers and serves as a vital route for trade and transportation between these two major metropolitan areas. The highway passes through several important states, including Maharashtra, Karnataka, and Tamil Nadu. Along its route, NH 4 facilitates access to various towns and cities, contributing to economic growth and development in the regions it traverses.