Consultant Patrick Balducci of Battelle Group told the governor’s transportation funding task force just now that axle weights matter, not just total weight of a truck compared to total weight of a car, when calculating impact on pavement damage. But, under questioning from committee members, he said the rule of thumb is that one fully loaded axle on a big truck is equal to the pavement damage of 10,000 passenger cars. Task force members were stunned. “It’s been measured,” Balducci told them. “For years, millions of trucks have been measured. These are engineering calculations that have been studied by the federal government beginning in the 1950s and continuing today.” When task force member Jim Riley asked what the difference might be if that figure were off by 25 percent - say, if a loaded truck axle were equal to just 7,500 passenger cars - Balducci said that would be contrary to “50 years of research on the part of the Federal Highway Administration.”
Betsy Z. Russell covers Idaho news from The Spokesman-Review's bureau in Boise.
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