Many have noted that Total VMT has flattened over the last 7 years and that VMT per capita has dropped over the last 10+ years. Generally people think that this shows that we're moving away from a car-oriented society as more people choose to bike, walk and take transit. I generally agree. But someone recently asked me if I thought that GPS-based directions were partly to credit for this. Afterall, wouldn't better directions result in more efficient driving?
Even if they do, and anyone who has used the devices knows that sometimes they direct drivers on weird routes, I suspect the bulk of driving is done by people who know exactly where they're going, because they go there 5 times a week. But that's just a hunch.
It's an interesting theory though.