What do the different letters for bus numbers represent?

MingFreeman SG

Some bus services have a letter beside the number. What is the difference between these services from the normal service number?

Like for example, svc 98 has 98A. What is the difference between 98 and 98A?

I remembered seeing other letters like B or W. I remembered seeing a TIBs bus on PIE with the number 9xxW. (I forgot what number is that.)

Y_Shun SG

98A is a Short Trip service, means it does not operates the full route of 98, but plys a certain stretch of the route. Short trips are most useful when there is heavy demand along a certain stretch.

A, B, C are all the same(same as in also short trip) and usually used by SBS Transit.

About that 9xxW bus, I believe it is 985W.

Basically some small stretch of route(985W) plies a little different route from 985, but actually it is the same. I have no idea why SMRTB called it W though.

dragg SG

those with A normally goes into certain areas during certain hours.

for example, industrial parks.

PurpleSmoke SG

Originally posted by Y_Shun:
98A is a [b]Short Trip service, means it does not operates the full route of 98, but plys a certain stretch of the route. Short trips are most useful when there is heavy demand along a certain stretch.

A, B, C are all the same(same as in also short trip) and usually used by SBS Transit.

About that 9xxW bus, I believe it is 985W.

Basically some small stretch of route(985W) plies a little different route from 985, but actually it is the same. I have no idea why SMRTB called it W though.[/b]

W for working trip?

Volvo Olympian SG

More like an alternative route.