There are three basic kinds of public transportation in most developing countries: large city buses, mini-bus taxis, and regular taxis (the kind that carry up to three people, like we have in the US). The mini-bus kinds usually have colorful local names, like Matatus in Kenya, Dala-Dalas in Tanzania, and Blue Donkeys in Ethiopia. Beyond these, there are sometimes variations by country. Bangladesh has the bicycle rickshas I wrote about here.
Uganda has a unique class of public transport: Boda-Bodas, which are small motorcycles, which rent for between 500 and 2500 Uganda Shillings ($0.27-$1.35). You see the Boda-Boda drivers loitering everywhere, looking for passengers. Kampala traffic is dangerous and bumper-to-bumper even inside a car. The Boda-Boda drivers are fearless as they weave in an out of slow and stopped traffic. At first I wondered why all small motorbikes in Kampala have leg guards. Now I know. The Boda-Boda drivers often bounce wheels off of cars, and push away with their hands as they weave between stopped vehicles. It's common to see as many as three passengers on one Boda-Boda, and I've seen some passenger situations that made me cringe. For example I saw a Boda Boda speeding past our taxi, weaving in and out, carrying a woman, side-saddle, with an infant in her arms. Another Boda-Boda, coming straight at us in a seeming game of chicken, weaved aside at the last minute, which is when I saw the toddler riding on the gas tank.
Boda-Boda drivers are required to wear helmets, but almost none of them do. Their passengers are not required to wear helmets, and none do.