The document discusses bus rapid transit (BRT) systems in three cities - Curitiba, Brazil; Ottawa, Canada; and San Diego, California. It provides details on the history and development of BRT in each city. In Curitiba, the BRT system was pioneered in 1974 and features bi-articulated buses on dedicated lanes. Ottawa's BRT system utilizes dedicated transitways that are grade-separated from traffic. San Diego is working to implement a BRT system to address future population growth, but faces challenges due to California's car-oriented culture.