iPhone Giveaway of the Day - Traffic Brains 2

You will need to optimize traffic flow. Preprogram traffic light patterns, place road signs to divert or block traffic, increase speed where is necessary, hit GO, and watch the traffic flow.
You will have to reach the target TRAFFIC EFFICIENCY.

You are the traffic manager. You will decide which and when the traffic light should turn green.
You will have to spot problematic places, where traffic jams occur and divert traffic using road signs.
This is not a real-time action game. You will be required to decide and prepare traffic logic in advance and program it. 
Prepare green lanes for best traffic performance and throughput and watch them flow.
- Program traffic lights patterns;
- Place road signs and traffic lights on the budget.
- Block roads to divert traffic;
- Cars drive around the city to the parking lots and back home;
- Buses drive on their route.
- Watch out for car crashes;
- 28 unique levels with beautiful cities.
- 8 mega cities levels