190S151,190S152 and 190S154 along with 190AM52/PM52 are all
direct starters from Bukit Panjang, they are not downroutes but
direct starters (unless they are starting from Bukit Batok fire
station, only then it is a downroute)
noted.
but since 180 is a loop service, so they are stated as 1/2
crossover trip.