As part of my daily commute to Arlington, I park in a garage at the Largo Metro Station. According to the Washington Metropolitan Transit Authority this garage has 2,200 parking spaces.
As I occupied one of the few remaining spaces this morning, I noticed something strange; I was one of the only commuters who hadn’t backed into my space. This confused me quite a bit, motivating me to consider my own rationale for not backing in. Here’s what I concluded:
- It takes as long to back in as it does to back out, but I would rather spend the extra time in the evening. This is partly because I am often running late in the morning, but even on days when I am not running late I prefer to back out rather than in.
- Backing in disrupts other commuters in the morning more than backing out disrupts them in the evening. This is because the garage is much busier at 7:40 AM than it is at 6:00 PM.
This is a classic economic problem in diguise: intertemporal substitution. I prefer expending time in the second period rather than the first because it is less costly. This cost comes from two sources: social disapproval and my own preferences. I don’t want irritate already angry commuters, but I also like saving a few minutes in the morning.
So here’s the question: why am I the only one? Does this result generalize to other parking garages? Most importantly, why is my life so boring that writing about parking garages amuses me? I don’t think anyone has an answer to that last one…