Makati, the financial centre of the Philippines, is home to just half a million residents. However, the daytime population of Makati - one of 16 cities that make up the metropolitan Manila area – is estimated to be more than three times that. Home to the highest concentration of multi-national and local corporations in the Philippines, it is a commercial hub: 600,000 vehicles are thought to move through downtown Makati on a typical weekday. Maintaining traffic flow and responding quickly to incidents is the