I believe LTA have their means to catch those errant OPC drivers who flout the rules. For now, even with the prevalance of COE, OPC, ERP schemes, morning and evening peak hour jams are here to stay. I just have to live with it.
My dad told me,L.T.A. now used the car's I.U. to catch O.P.C. cars that use without paying,when the car go thru some area,not even E.R.P. gantry,a data will be recorded,you will have until 2359 to pay up,if you don't pay,summon will be send to you.
If lets say OPC car need to use those restricted hours, how much is have to pay? Pay for hours or 1 day?