What would you change about your hometown?

Yogyakarta has only few kind of limited public transportation, that only covers certain areas. It is become a barrier for many people, especially for people those who are living in the interior of the city centre and who do not owning any private vehicles, and tourists. It is also causes traffic jams around the city.

Public transportation is really important for people who are do not owning any vehicles. [for those without a car] It is usual common that each member of a family in Yogyakarta has a private vehicle so that each of them can easily running manage their daily activities, such as going to school or going to office work. But how about all the other families that cannot afford to provide private transportation for their member? It will be a burden for them because they can not go anywhere.

Traffic jams are is also a result from lack of public transportation in Yogyakarta. If you drive along the main roads, particularly on weekends or public holidays, you will be faced with traffic jams. There are traffic jams all around the city. It is by all odds caused by the abundance ownership of private transportation. Suppose a family has five members with and each of them owns a car. There will be five cars in a per house. If there are five such families then there will be twenty-five cars.

A decent public transportation in the city can be a solution to reduce traffic jams. If there is a proper public transportation system available throughout the city, the family would think that using car will cost more money and rethink about their decision for each member to have a car. There may be only one car for every family and five cars for five families. This will definitely contribute to reduce the traffic jams.

Improvement of public transportation is essential in Yogyakarta as the city is one of tourist destinations in Indonesia. Tourists visiting Yogyakarta surely will face difficulties going around the city because there are not many options in transportation. They have to take a taxi, especially to reach areas that are not covered by public transportation. It will cost much money.

I haven't removed all the duplications, but:

'transportation' is generally shortened to 'transport'

'cars' can be used instead of 'private vehicles' unless you are going to specify that a family has for example: two cars and three motorcycles.

If you used an approximation of the population instead of 'five' it would show the point better.

If London was used as a City who is tackling this problem, you could have mentioned other types of public transport and restrictions on car use.