Singapore legislation
Regulation 61
of Highway Code
Regulation 61
Overtaking on the Right
This rule does not apply —
(a)
when the driver in front has signalled his intention to turn right, in which case you can overtake him on his left;
(b)
when you are filtering to the left before a junction; or
(c)
when there is slow-moving congested traffic and the vehicles on your right are moving more slowly than your vehicle.