You need this mod first, it's brilliant!

After you subscribed this file, you must enable it first in game

By starting any games, anyway, an existing complete fully developed city is recommended. You will see the button on the top of right corner.

Here you can set the first person on a car, or even walk in the every place in the city like a citizen.

If you're interested in my city, you can subscribe it

Here are some screenshots I took in several views.