With the fact that platform doors have been installed on every station of the Xinzhuang and Luzhou MRT lines, improving berth accuracy of automatic train control system is a real challenge. The points discussed in this article are as follows: ♦ Introduction of Carborne ATC Cabmatic III installed on the Xinzhuang/Luzhou lines ♦ Operation theory of programmed station stop on the existing MRT lines ♦ Enhancement of programmed station stop system on the Xinzhuang/Luzhou lines ♦ Set-up of the parameter of PID on the portable test unit for programmed station stop