Used to be 110 miles each way, Moreno Valley to Coronado, every day. Then I transfered to a ship at 32nd St, so it was only 105 miles each way every day, but when the ship got underway, it was less than 867 feet, and the only gas I burned was from the beans at dinner.
During that time I discoverd that Chrysler products' cruise controls only go to 86 MPH, making them effectively useless for flying low on the I-15. Toyota Avalon cruise control, however, will allow you to set it at 105.
Now, it's about 50 feet, and I often work in my underwear or pajamas, depending upon the time of year.