However these problems have arisen and are a very serious problem not only for our generation but also for future generations. Therefore, it is necessary to make changes to urban transport. Paragraph 5: Meeting the challenges of the future will often require the adoption of new business models. Most urban transportation business models are in a growth or maturity stage. These models embrace technologies developed for both individual and collective modes of transport such as buses, trams and trains. Hybrid cars are already a welcome part of the landscape, but many other radical new technologies have been launched or are in development that will revolutionize travel in the cities of the future. Solar-powered buses and trains that eliminate the need to build new tracks astride existing highways are two of the industry's most eye-catching projects.