The red and the green
All minibuses that operate in Hong Kong either have a red or green roof, and the difference is important. Green minibuses are more common, and follow more stringent regulations, which translates to a more concrete route, more defined operating times, and proper bus stops. Red minibuses, on the other hand, are less regulated and most of the time privately owned. The route is subject to change depending on what the driver thinks will be fastest, as they can pick up and drop off more passengers in a day, and maximise their time out on the road. These minibuses can sometimes run 24 hours a day, making them an extremely popular and convenient option for late-night travellers.