The consumers often don't have a choice.
When I was in high school, gas was 50 cents a gallon. As it neared $1.00, we all swore we would stop driving if it passed $1.00 a gallon, but when it came down to it - - - the life and times of living in walking distance of your office passed many of us by years ago.
I have a "short commute" to the office, but I pondered 'walking' recently when I had car trouble. It wasn't a realistic pondering. Fifteen miles in and fifteen miles out, and not a "straight line" possible in the whole thing due to playa lakes, fenced off fields, etc., in the way.
Biking in my city is suicidal.
I'm actually more likely to be able to do it than friends in larger cities though. Imagine trying to walk to work in Dallas, Texas or Houston, Texas or Los Angelos, California.