Most people think that the more people have cars the better, it is not the case all the time because there are advantages and disadvantages. Public transportation also has advantages and disadvantages. There are three reasons for use of public transportation one advantage and two disadvantages.

Supporting detail 1: One advantage of public transportation is faster commutes. People can get from one point to another by bus, commuter rail, and subway or metro.

Supporting detail 2: One disadvantage is that it can be crowded. During rush hours buses and trains are packed with commuters which leads to less space. Whenever a bus or train brakes suddenly it can cause passengers to bump into one another.

Supporting detail 3: Another is long wait times. When there is bad weather it makes vehicles arrive later than the normal time. Whenever there is signal problem on a commuter rail, subway or metro line it makes wait times longer.

In conclusion most people think that the more people have cars is better, it is not the case all the time because there are advantages and disadvantages. Public transportation also has advantages and disadvantages. There are three reasons for use of public transportation one advantage and two disadvantages, one advantage is faster commutes and two disadvantages are it can be crowded and long wait times.

Does it look good so far, let me know if I need changes or show me a proper way
to write?

Also for supporting detail #1 it is kind of short can you show me a proper way to write with more details?