At present, the private cars are more and more.
As there are not enough parking lot,private cars park along the road casually,which make the road narrow and the serious phenomenon of traffic jams. It influences our traffic heavily.
I think it must pollute environment. Because harmful gas emissions from motor vehicles caused by air pollution.
So I think we should slow down the development of private cars. Improve the bus speed, comfort and so on, developing public transport. People go out by bus.