57 or 59 is better off plying Lor 8 to provide a direct link
from Bishan to Toa payoh industrial park, as for lor 1, some of the
buses which ply lor 4 should use lor 1 or 2 instead, lor 4 is too
congested with long lines of buses
28, 56, 73, 88, 105, 153, 155, 157, 159, 163