Assam State Transport Corporation or ASTC is a state owned road transport corporation of Assam, which provides bus services within Assam and adjoining states. Assam State Transport was started as a State Government Department with four buses to run between Guwahati and Nagaon. Gradually the transport network of the department expanded throughout the state of Assam. The state transport department was converted to a corporation on 30 March 1970. All buses have the registration code AS-20.
ASTC operates Hi-Tech Luxury (AC/Non AC) buses for long distances and Hi-Tech semi and mini deluxe bus services for city and rural areas. There are also many private buses operating under ASTC.
The ASTC City bus service of Guwahati has 11 air-conditioned (AC) and 50 non-AC buses under (JNNURM) Phase-II. These city buses ply between Jalukbari-Noonmati, Jalukbari-Beltola via Paltanbazar, ISBT-Mirza and ISBT-Jagiroad routes.
In 2013, the corporation mooted a proposal to implement a Global Positioning System-based tracking system to ensure efficient city services.