Coimbatore is a city in the state of Tamil Nadu, India. Most transportation in the city and suburbs is over its road network. Coimbatore is well connected to most cities and towns in India by road, rail, and air, but not through waterways. The city has successful transport infrastructure compared to other Indian cities, though road infrastructures are not well maintained and developed according to the growing needs of transport, making traffic congestion a major problem in the city. A comprehensive transport development plan has been made to address many traffic problems. Roads The Coimbatore city and metropolitan area is divided into five administrative zones (East, West, North, South and Central) which are served by major arterial roads that run in an east–west or north–south direction. Avinashi Road is one of the city's most important arterial roads, traversing most of Central and East Coimbatore. It is part of National Highway 544, which connects to Bangalore, Chennai. Other arterials include Trichy Road (Central–southeast), Mettupalayam Road (North–South), Sathy Road (South–northeast), Palakkad Road (East–West), Pollachi Road (North–South), and Thadagam Road (East–West). Maruthamalai Road starts at the intersection of Lawley Road Junction and connects to the neighbourhood of Vadavalli and the Maruthamalai foothills. Other roads include 100 feet road, Bharatiyar Road, Dr. Nanjappa Road, Balasundarum Road, Crosscut Road (in the Gandhipuram commercial district), Diwhan Bahadhur Road (DB Road), TV Swamy Road, Brooke Bond Road in RS Puram Areas, and Race Course Road. In January 2012, the Coimbatore Corporation announced that they would be laying around 10 roads by mixing plastic. National Highways Five major National Highways radiate outward from Coimbatore: NH 544 (Salem–Kochi road) NH 81 (new NH code for Trichy Road) towards Karur, Tichy, Thanjavur and Nagapattinam. NH 181 (Mettupalayam Road) towards Ooty and Gudalur leading to Karnataka and Kerala. NH 948 (Sathy Road) towards Sathyamangalam, Chamrajnagar, Mysore and Bangalore. NH 83 (Pollachi Road) towards Palani, Oddanchatram, Dindigul, Trichy, Tanjore and Nagapattinam. Ring roads A major bypass was built by L&T from Neelambur to Madukkarai on NH 47 which intersects the Trichy Road at Chintamani Pudur near Irugur and Eachanari in Pollachi Road. The Coimbatore Corporation is undertaking the construction of six railway overpass bridges in the city. The National Highways Authority of India has invited feasibility studies to upgrade the National Highway connecting Pollachi and Bannari passing through the city. Public transport Most of Coimbatore's intra-city transport requirements are met by extensive