Monday, September 2nd is Labor Day, which is known as the unofficial end of summer. Road trips are still the most popular Labor Day getaway as many people are taking advantage of the long weekend. Gas prices are expected to be lower. Americans taking road trips should expect to pay less for gas compared to last year. The national average over Labor Day weekend last year was $3.81. In recent weeks, gas prices have remained steady, hovering around $3.40. And drivers should expect the most severe traffic jams before the holiday weekend as commuters mix with travelers.