BNL is high density area.. got many ppl and buses coming
endlessly.. 181 only serve a small area, partly covered by 243. i
think SBS is prudent about the new services, thats why freq is low.
sv48 also low freq.. sv88 improved after 6 mths, fm 12-15mins to
5-11 mins.. we wait and see 
rem sv323? freq bet 10 - 30 mins.. always empty.(i took a ride
b4)
sv268 at night at 15 mins.. also no good
Bt Merah feeder also above 10 mins..