TWIN FALLS, Idaho (AP) — Two companies have asked the Idaho Transportation Department to allow heavier trucks on highways crossing a dozen south-central Idaho bridges.

The proposed increase to the weight limit could mean fewer but heavier trucks on sections of U.S. 93 and Idaho 75 because trucking companies would be able reduce the number of shipments by being allowed to add that extra weight, The Times-News reported Wednesday.

The transportation department will hold two public hearings this week regarding the requests by Capps Inc. in Jerome and Glanbia Nutritionals in Twin Falls.

The first proposal seeks to increase weight limits on Idaho 75 from the intersection of U.S. 26 in Shoshone to Hailey. The second would increase weight limits on U.S. 93 from the intersection with U.S. 30 in Twin Falls to the intersection with Idaho 25 east of Jerome.

Under the proposals, certain permitted shipments could weigh up to 129,000 pounds (58,500 kilograms) on these routes.

"The intent is to allow trucking companies to reduce the number of shipments by being allowed to add that extra weight," said Adam Rush, the department's public involvement coordinator.

The state requires commercial vehicles weighing more than 80,000 pounds (36,000 kilograms), or exceeding other weight and height requirements, to obtain over-legal permits. On some highways, the state also sets a 105,500-pound (48,000-kilogram) limit on reducible loads, which contain multiple items that can be shifted or easily removed.

The proposals would benefit trucking companies with reducible loads, which make up more than half of all over-legal permits in the state.

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Information from: The Times-News, http://www.magicvalley.com