172 from LCK to Shenton Way, imagine the current 975 full route,
and then continues from Bt Panjang to Shenton Way, super damn long.
Still remember the JRBP OF1413s on this route.
171 was later extended to Yishun Int, it basically had not much
of the route change till today, except that it now does not turn
into Mandai Lake Rd. Journey made slightly shorter by diverting to
BKE instead of old Woodlands Rd.