Avadi (“ஆவடி”) is a suburb of chennai and a municipality in Thiruvallur district in the state of Tamil Nadu, India. Avadi is an acronym for “Armoured Vehicles and Ammunition Depot of India”. Situated about 23 km north west of Chennai, it is surrounded by major defence establishments. The neighbourhood is served by Avadi railway station of the Chennai Suburban Railway.
The major military establishments having divisions in Avadi are the Indian Air Force, Indian Army, Heavy Vehicles Factory (HVF), EFA-Engine Factory,Avadi, Combat Vehicles Research and Development Establishment (CVRDE), Central Reserve Police Force (CRPF), Indian Navy, Central Vehicle Depot (CVD), The Ordnance Depot [OD], Unfit Vehicles park [UVP] and the Ordnance Clothing Factory (OCF).