26, 54, 63, 130, 135 used to have DD in the past.
151 should need DD ( I don't know about the situation in NUS ),
because the morning peak hour demand is quite high.
As for 38, Jalan Kayu is also quite narrow, why SBST still can use
ADD for 86 and 161? Tampines Rd also narrow, 72 has its fleet with
majority ADDs. ( Last time when 81 call along Tampines Rd, 81 also
have DDs used ). Towner and McNair Rd, together with Whampoa Drive
and Kim Keat Rd, all are narrow roads, why 21 have ADDs?
