It's easy.. those town outside the cbd, just draw those 3 color zone where the the ones in the middle start work first.
If 40% in a single time is huge, can split it into another 2 timing.. each only 20%.
Then we don't need COE or ERP to control the traffic. Maybe only for weekends in the CBD area.
how are going to zone the whole island? do you want to implement this at the schools as well, such that the road at around 7 am is clear? Maybe you can suggest P1 and 2 start at 6.30, P3 and 4 starts 7.00, P5 and 6 starts at 7.30.
this is too much micro managing. how are you going to implement? how are you going to enforce? It is never going to work.
though i do not support our garmen, they are not stupid. they have tried quite a lot to try to solve these problems
eg free off-peak travel,
starting new regional center away from the core central areas
building more lanes on the expressways etc
not to mention erp and coe