Not only does walking spark creativity, but I've met a lot of new people this way.
[1] http://vowofnow.com [2] http://summonthewarrior.com [3] http://selfexperiments.com
Not only does walking spark creativity, but I've met a lot of new people this way.
[1] http://vowofnow.com [2] http://summonthewarrior.com [3] http://selfexperiments.com
Now imagine a mobile climate-controlled bubble with no noise but whatever you put on the radio or barring that, the constant background of rubber rolling across asphalt, and you get that same effect.
All in all there are different environment which helps thinking. Long walks put your body in long term effort, releases endorphins which helps inspiration, or at least relaxation. Isolation helps too, be it showers, cars, toilets ... whatever works.
There's really, really little traffic, and it's mostly long straight roads.
EDIT: The attention grab isn't because of traffic. I can ride an empty road in the middle of nowhere and the action of pedalling and looking down the road just grabs me.
EDIT: Although the points raised by others about cars providing a nice isolated comfortable environment makes a lot of sense as well. I guess it all depends.
Quick test: it's easier to concentrate for lengths of time listening to the radio when in the car than when walking.