Furthermore, travelling by car is not very comfortable for a driver. He cannot relax, he has to be careful all the time. Vehicles are forced to stay in traffic jams, it is also very uncomfortable. Passengers can sleep or doing what thay want. When driver is very tired, he can be as dangerous on the road as drunk driver. Those who are concerned about the environment may feel that lots of journeys by car along routes where public transport is available is costing the environment unnecessarily. You can help this by walking for short distances when available, using an environmentally friendly car and sharing your car with others travelling to the same place as an alternative to public transport.