Gas prices have significantly decreased across various states ahead of the Labor Day weekend, with national averages falling to $3.35 per gallon. Tennessee, in particular, has seen prices drop to an average of $2.89 per gallon, making it one of the states with the lowest gas prices in three years. Colorado and Florida also reported declines, with averages at $3.30 and $3.27 per gallon respectively. Experts attribute these drops to low oil costs, mild gasoline demand, and a well-supplied market. Despite the drop in prices, heavy traffic is expected over the holiday weekend, and motorists are advised to plan their routes to avoid congestion and consider using higher-quality Top Tier fuel for better engine performance.