181 should be extended to Bulim Depot by Q1 next year.
The only proposed route extension that I know of is the one done
(at page 88 of
http://ttsgroup.com.sg/wp-content/uploads/2012/05/Wenya-TIA-Report-May-2012.pdf)
when the traffic was assessed on Wenya (Bulim) Industrial Park:
I do not understand why they do not want Jurong West Avenue 3 to
intersect with Bulim Avenue, and Jurong West Street 25 to intersect
with Bulim Drive. Otherwise, 181 can just go straight from Jurong
West Avenue 3 to Bulim Avenue and return from Bulim Drive, via
Jurong West Street 25.
Well, if 181 is extended to Bulim Depot next year, will it go
into Bulim Depot, or will it just loop at the roundabout at Bulim
Drive? Because I do not think Bulim Drive will be extended to Jalan
Bahar soon.
Anyway, the assessment done in year 2012 also indicated that the
Wenya/Bulim bus depot could be a temporary facility. The site it is
on now is actually meant for an integrated dormitory and for the
Clean Tech industry.
I guess Wenya/Bulim depot will be replaced with a train-cum-bus
depot at the site between PIE Hong Kah Flyover and the junction of
Jurong West Avenue 2 and Bulim Avenue, by year 2025 when Jurong
Region Line opens.