Some countries have vechicle-free days, when privite cars, trucks, motor-bikes are banned in the downtown. Only public transportation such as buses, taxis and metros are permitted. For me, this can have a advantage for some people to make them more mobile, if there are any damages in their private cars one day. But the disadvantages become more, when some private workers and businesses depend completely on their trucks to transfer significant products, such as medical equipments. So this can have negative consequnces on a lot of people at the end than his advantages.