Can tell by noticing how many old Nissan UDs are being "dumped" on
a particular route. Services 178, 187, 853, 975 are among the main
victims 
.
Whereas some services like service 851 - always the 1st to
get new buses in Tibs/SMRT's fleet, from Merc 0405 way
back in 1994 all the way till now with Merc OC500LE
fleets. Still remember the NAC ELBO Scanias which also made the 1st
appearance on service 851 in 1996, now thees ELBOs are in a very
bad conditon and were so called "dumped" to services like 187 and
852.
For OAC Nissan UDs, most of them started off with service 854.
After which Merc buses were bought in 1-2 years later, service
854's AC fleets were replaced with Mercs. All the Nissan UDs were
then assigned to those other not so profitable routes when they
were converted to PAC in the later phase in 1995, eg. service 160,
182, 925.
Haha, lol, Wanna catch it on svc 187 lol, maybe both. ELBOs and
the UDs.
