 SMRT first attempted to install a passenger information system SMRTime on trains using LCD displays in 1999 ; these have since been removed . In November 2006 the doors of three cars ( carriage number 3006 , 1006 and 2006 ) were installed with a dynamic , in @-@ train system displaying station information for testing ; these are similar to ones used by Hong Kong 's MTR . An initial prototype of STARIS based upon the existing Automatic Transit Info System was developed in @-@ house ; this was removed before the end of the year without entering service . 
