MULTI-colored automobile icons—flashing green, blue, red, and orange—cover a map on the monitor screen in the Blue Bird Taxi Call Center in Mampang Prapatan, Jakarta. Many of the icons were grouped around Bung Karno Stadium, Central Jakarta, on Tuesday three weeks ago.

From this work desk, Rizki Bayu, Manager of Central Operations of Blue Bird Group, stares intently at a 40-inch monitor. The automobile icons move and change color. &l