seems that OCs on sv 75, 176, 188, 190, 700, 970, 985 are geting
common nowadays..
Plus some like 969, 961, 853 & 980 or even 925. I think is
due to batch 2. Batch 1 15% of it on service. the rest on SP.
So after those bus went to WLDEP, the other service have not enough
buses, so they use OCs. That is what I think.