In 1994, The Two started off as Double 2, with buses running every 15 minutes. It was then increased to every 12 minutes a few years later.
Double 2 now goes yellow as of 2004, introducing a new Rainbow route, 'Rainbow 2'. The frequency of every 12 minutes remained, and with low floor creature comforts.
Rainbow 2 got a major makeover with: a new name, air con, leather seats, and laminated floor. The frequency still remained the same, and it became The Two.
As of October 25, 2015, The Two gets bigger buses, with: more seats, fast 4G wifi, USB sockets, new creature comforts, and a new frequency of every 10 minutes, instead of 12 to improve reliability.