The trend in Idaho is clear, according to a new highway cost-allocation study presented to the governor's transportation funding task force today: "More and more overpayment on the part of automobiles and pickup trucks, and more underpayment on the part of combination trucks." That's what consultant Patrick Balducci of Battelle Group told the task force just now. There are a few different ways to look at the numbers. When the full picture of federal and state funding is taken into account, along with the impact of the GARVEE bonding program, the disparity looks even worse: Drivers of passenger cars are overpaying by 47 percent compared to their cost of wear and tear on the roads, drivers of pickups are overpaying by 18 percent, and drivers of combination semi-trucks are paying only 67 percent of the cost they create, a 33 percent underpayment.