A Public Hearing is being held today by the Connecticut legislature's Transportation Committee about a bill to eliminate gasoline zone pricing.  Senator Tony Hwang, whose district includes Newtown, says gasoline distributors have long operated under proprietary zone pricing maps, that arbitrarily designate relative prices of gasoline based on where people live.  He says the zones lead to increased prices in high-cost areas of the state, and can vary as much as 60-cents per gallon.  Hwang says the practice stifles competition and prevents new potential retailers from entering the market.