Quality vs. Time in Transportation
Marshall compares the time/quality differences in his commute options: drive, subway, bike or walk.
"Travel between cities offers qualitative differences as well. Plane travel seems to have become a series of lines that one waits in, broken up by small quantities of actually flying. Train travel, if available and good, can offer unbroken hours for sustained concentration. Driving for hours in a car between cities, with or without company, can be good or bad depending on temperament, one's physical size and the quality of one's stereo."