Wrong. Not same reason. For 291/293 the "official" reason was
that people weren't getting to the upper saloon for just 4/5
stops(though I personally find that excuse senseless coz if the DD
is full people will definitely go to the upper deck). Trees were
definitely not a problem for Sv. 291 pre-change(the route before
amending to serve St 84. Maybe it is coz the DDs are such a pain in
an ass to turn St 84 to St 83(that ultra bloody tight corner). Sv.
293 also has tight corners(Ave 5 to St 71).
However there is no reason why Sv. 18 does not have DDs. Entire
route is DD capable. Along Tampines Ave 7(also have Sv. 8, 21 and
37 DDs). Along Ave 2 there is Sv. 8, 17, and others. Virtually the
entire route is DD doable. BNDep just has a shortage of DDs.
In a route where DDs are not employed, it is usually becoz of
the prevailent road condition(sharp turns, etc. ).
Lolx Svc18 last time has DDs Cameo be4
AMDEP/BRBP - 217 DDs Buses
ARBP/BBDEP - 183 DDs Buses
BNDEP - 207 DDs Buses
HGDEP - 184 DDs Buses
SLBP - 241 DDs Buses
In total
1) SLBP has the most DDs in depots
2) BNDEP (one depot also have the most lolx
so BNDEP not shortage of DDs after all