PHILADELPHIA - Pulling up to the pump may finally mean less sticker shock for Philadelphia drivers.Average gas prices have dropped below $4 a gallon in the Philadelphia area after some stations charged over $5 this summer.Philadelphia prices fell to $3.99 a gallon on Monday - the first price below $4 since March 3.MORE HEADLINES:Averages are down 13 cents since last week, 45 cents from last month and $1.12 since gas hit a record-high of $5.11 on June 12.Pennsylvania state prices are also less than $4 a gallon this week, matching Philadelphia's average $3.99 per gallon.New Jersey is trending downward with Pennsylvania as prices drop to $3.82 a gallon..