BANGALORE: Indian road network, with an estimated length of about 4,689,842 kilometers, is the 2nd largest in the world. It consists of expressways, national highways, state highways, peripheral roads and local roads. Among all, here are the 5 longest expressways that connect different regions of India, reports Rediff. Yamuna Expressway, Uttar Pradesh: Also known as Taj Expressway, Yamuna Expressway is a 165 km long, a 6-lane controlled-access expressway. It connects Greater Noida with Agra located in the state of Uttar Pradesh, India. It was formally inaugurated on 9th Aug, 2012 by the Uttar Pradesh Chief Minister Akhilesh Yadav and was thrown open to the public. The total project cost is approx Rs.13000 crores. The beautiful expressway includes long flyovers, 7 interchanges and many major bridges along with elevated highway of few kilo meters.