Here's the Annual Report for FY 2011.
http://www.smrt.com.sg/investors/documents/annual_reports/2011/index.htm
And here's the passage that kuang mentioned,
"Over the next
two years, SMRT will be buying 238 new buses to replace the older
fleet. The new additions will be wheelchair accessible buses (WAB)
with low-entry flooring to cater to wheelchair-bound passengers.
With this purchase, SMRT will have a total of 372 WABs, compared to
134 today. SMRT Automotive Services will be responsible for the
commissioning, repair and maintenance of these buses, which will
comply with the Euro V standard. The vehicles will be based on
either the Exhaust Gas Recirculation or Selective Catalytic
Reduction technology"
134 is obviously the 134 OC500LE. This means that the 238 new
buses already includes the 11 citaros, so we're looking at a
additional 227 new buses in 2 years.
In short, there should be about 100 more smrt buses coming in by
the end of the year, and about 100 more next year.