 A mock @-@ up was manufactured in Japan after Kawasaki won the contract . It was shipped to Singapore and put on public display during the 1984 National Exhibition held in November 1984 at World Trade Centre . The mock @-@ up featured three choices of seating arrangements and colour schemes ; members of the public were invited to give feedback on these options . The finalised interior design of the C151 trains consisted of a fully longitudinal seating arrangement . The bucket seats were made of plastic ; glass partitions separated the seating areas from the passenger doors . Strap lines for standing passengers were installed in the middle of every car . The colour scheme of each adjacent car 's interior is distinct to make car identification in cases of fault reporting easier for passengers . Originally the colour scheme of the driving trailer cars was orange , that of the second and fifth motor cars was blue , and that of the two centre motor cars was green . There were nine seats between two doors ; this was reduced to seven after the first round of refurbishment . 
