The Timings idea is flawed. Why you will ask?
What do you do the rest of the time they are not implemented? Such a weekends?

Some Things that have to be done are:
1. Look at traffic light timing, I seen many inconsistency on how long the red lights are on.

2. Widen Road in some places, especially going to the right or left. One of the lead cause of traffic build up is because drivers cannot go right or left at the traffc lights becuase other, cars are blocking them because of a narrow road turning.

3. Get rid of Roundabouts people don't know how use them here anyway.

4. Drivers should also be punished for driving below the speed limit, we have all seen before some driver in the middle lane driving at 40 Kmh, of 80 Kmh road.

I'm sure other issues are the cause but it's a start.