First of all, I want to say that I don't know that your sentences are correct or not. But I wanted to write my sentences =)
An essay for correction
The only way to reduce traffic congestion in cities is to promote public transport. Do you agree?
Because of the negative impact of cars on the environment, the authorities have been encouraging people to use public transport in many cities. Thus, the filled bus produces significantly less exhaust fumes than a few full cars.
Large transportation vehicles on schedule and sufficient amount of it disciplines people, free from a large number of cars on the roads, improve the ecological environment of the city. (I Couldn't understand what you mean sorry)
Private cars are comfortable for people, however providing free Wi-Fi, air conditioning and sockets can convince them to use public transport.
To reduce the number of cars, the roads towards the city center needed to be limited and the parking spots should be increased, with these kind of changes, streets will be safer and quieter. In addition, modernization of traffic lights and giving detached lanes for buses, trolley buses and trams also impel people to use public transport.
In conclusion, the instant actions should be done by the government in the short term to improve the quality and quantity of public transport not only to prevent traffic jams but also create a better urban environment.