A development project of this size will quite likely cause some impact to people as well as its surroundings. DOH therefore made a decision to design the project so as to avoid or minimize any likely impact on nearby communities and the environment. DOH’s care in this area led to an approval for its Environmental Impact Assessment Report (EIA) from the National Environment Board on 29 July, 1998 (The EIA Report for the Intercity Motorway Project, Bang Yai – Ban Pong Section) and on 25 August, 2003 (The EIA Report for the Intercity Motorway Project, Ban Pong - Kanchanaburi Section).
During the years that had transpired, many changes have been brought to the project area. Accordingly, DOH in 2016 decided to commission a re-assessment of the EIA report aiming to review details where significant changes from the previous conditions have occurred. As a result, findings of the new EIA study were approved by the National Environment Board in 2017.