I read this interesting report by Kristi Goldade.
"It revealed that when participants were aware of the height, high ceilings activated abstract thinking and thoughts of freedom, whereas low ceilings activated concrete thinking and thoughts of confinement."
If you don't feel like reading, listen to the researcher, Joan Meyers-Levy, talk about high ceiling and abstract thinking.
Here are some photos of locations with high ceilings that have promoted MY abstract thinking this past year:
St. Paul's Cathedral
Grand Central Station
So why is it that I get so much free and abstract thinking done on long distance drives? My car ceiling is low. Is it the expansiveness of the highway stretching out in front of me?