dtype,
It's not been mentioned, but many cameras, inc. the "Hero" lauded above, offer a 'time lapse', still picture facility. They will take a picture every X seconds or minutes.
Every one will be a lottery if you are driving, but who cares? It's digital! And maybe better than taking your hands off the wheel to press the shutter button.
Try this shopping Google search for "time lapse camera".
http://www.google.co.uk/#q=time+laps...w=1280&bih=752
John