Despite rising gas prices this year, overall traffic volume increased in both January by 1.6% and in February by 1.8%, compared to year-earlier levels, according to data released this week by the Federal Highway Administration. The 1.8% increase in February was the largest annual gain in monthly travel volume since October 2010.  Perhaps the increase in traffic volume was due to the mild winter weather this year, or maybe it reflects an economic recovery that is gradually gaining momentum?