this is because, before the days of NEL, the fastest way out of
Sengkang to town is by 501 or 502.. thats why alot of people takes
it... do you know, if i take 85 from Sengkang to Orchard, it takes
about an hour plus to nearly 2 if theres a jam.. if i take 502, it
takes only 40mins... thats why the load is High and you have buese
like Tridents and VSO(our very 1st VSO) on 502 at that time.