Just for yucks, you could get P.O.V. shots from your Grand Theft Auto videogame and edit in an actor behind the wheel of a real car! Heck, that would be funny to watch. Ha ha!
There are many tricks a filmmaker can employ to create any scene. Sometimes, the bigger the scene, the less you show. Most of my stuff is based on the "make it in editing" approach. Two shots might not mean much by themselves, but edit them together and they suggest an action. You can show a guy behind the wheel, cut to a shot of a back tire peeling out and then cut to a P.O.V. of a fast moving roadway and it all starts to mean something.
The answer to challenging scenes is deciding on...
a point of view. If a whole chase is too difficult to shoot, perhaps add another point of view. In this case, you could have the kidnapped character in the trunk or tied down, laying on the back seat. You experience the chase from this person's P.O.V. Very few external shots would be needed. This is what creative filmmaking is all about.
There are other tricks. You can have a shot of two cars whizzing by a house at 100 mph. To do this, you can have the drivers going 25 or 30mph and speed up their part of the footage. But, to make it look real, you can use a Mask and have a couple of actors on the right side of the screen, sitting on their porch, moving in real time. You also mask around the area which the cars are actually visible - for instance, trees blowing in the wind. Only the frame area of the street where the cars appear is sped up. You then add some blur to each car to suggest something going really fast.
A mask is taking 2 or more shots and erasing (masking out) parts of the setup shot that you don't want to see. An example of a mask; I took this shot of me pouring milk on my keyboard.
In actuality, I pour the milk on this glass and then masked it out with the shot of the keyboard.
That is what you do with the cars. All the elements - trees, people on porch, etc. - outside of the car area will be masked in from the overall shot.
You can also add greenscreen, behind, in front, or to the side of the driver, so that the background can be added seperately and sped up, while your actor stays at normal speed. I've used the greenscreen way a number of times:
As Rok mentioned, CG can work. Between having an alternate point of view, a few choice shots and some special techniques, it can be done.