[4] Kopaja buses have a rated capacity of 20-30 seats like the similar MetroMini service.

[5] Further, Kopaja diesel vehicles are often badly maintained and contribute significant amounts of pollution in Jakarta.

There are numerous routes which crisscross the city and link into the Transjakarta Bus Rapid Transit (BRT) system.

Efforts to upgrade the service by introducing newer air-conditioned Kopaja buses in 2012[10] have so far attracted limited custom because passengers are reluctant to pay the higher Rp 5,000 (about US 50 cents) price for the higher-quality buses.

But somewhat confusingly, most buses have large garish names plastered across the front window as well such as Mawar (Rose), Bunga (Flower), Ikhlas (Sincere), Firdaus (Paradise) and even Sexy.