The Philippines is certainly up there on the crowded spectacle meter of buses and other transport vehicles. I remember seeing three people standing on a bus bumper holding onto the roof as we drove behind over a bridge. The paint jobs, detailing, added hardware (bumpers!) was fun to look at. But one pothole, a loose grip and you are not showing up to work that day.
I am always amused by what seem like cross-cultural similarities to the colorful, blasting stereo vehicles in each location. I guess the colors are inspired by the tropical climates' flora, and other cultural influences.
Indonesia has its becaks or moto-becaks (bicycle or moto-powered rickshaws), but it is more conservative here with regards to transport both outside and in them, but people pile in.
Thailand has the tuk-tuk and motocabs.
I am stirred when seeing a family of 4 or 5 on a 125cc scooter here in Java. No helmets, kids sleeping on the back with their school knapsacks, and a kid standing in front, no eye protection or helmet, squinting at the road.
I have two older children back in the US, and a newborn girl here. I always have to adjust to car seats, and transportation in general when I return for a visit, and NYC traffic now looks so tame to me.