A Draft Plan From The Virginia Department Of Transportation For 2-Billion Dollars In Needed Improvements On Interstate 81 Could Be Paid For With Tolls For Trucks And Cars. The Plan Includes 72 Safety And Congestion Improvements From Bristol To Winchester. The Plan Could Be Paid For With Retail Sales Tax, Increased Fuel Tax And A Variable Toll Rate Initially Targeted At Heavy Commercial Vehicles, But Could Include Passenger Cars.