I remember before they chased away the residents at kampongs along telok paku and nicoll drive, bus 1 used to ply from Delta Circus to Changi Village, 1A (later numbered 3) too but it took an alternative route. Bus 2 plies from the old Commonwealth Ave terminal (the current Commonwealth Ave road sits on top of the terminal) to Changi Village. Bus 1 and 3 hv since become obsolete although there is a new bus 3 now plying between punggol and tampines. Bus 2 has been shortened to New Bridge Road terminal
Bus #4 running along Tampines to Katong area in the past if I recalled correctly.