Not sure where to start with this one?

Hi guys,
I am looking to design a animation of people walking on pavement and cars etc on the road, but i’m not sure where to start!!! I need them to go up and down (disappearing as reaching end of road you can see) the screen rather than accross the screen. Any files, tutorials would be really helpful.
thank you

rotoscoping may be a good way to go.

Thanks for your reply rawnewdlz, i’ll search rotoscoping.