Actually can take 13 and alight opp AMK library and walk for
about 5-10 minutes if want to go to AMK interchange.
Then 88 also goes from Bishan to Ang Mo Kio MRT right?
Alternatively, also can take 53 55 or 156 further down bishan rd to
change to 162 if want a faster journey... Of course the fastest is
still the MRT if you want to go travel between AMK and Bishan.