Traffic congestion is a big problem, especially in big cities. It makes people late for work and can be very annoying if you're stuck in traffic for a long time.

Using different modes of transport can be expensive. For example, buying tickets for the bus every day adds up, and if you have a car, the cost of maintenance and fuel is also high.

Not every place has good buses or trains, and some people, like those with disabilities, find it hard to use public transport because of things like stairs at stations.

Cars and buses cause a lot of air pollution, and people are also worried about the pollution from airplanes. There's also noise from all the traffic.

Traveling can sometimes be dangerous. There are accidents on the roads, and sometimes public transport can feel unsafe, especially late at night.