PROJECT TYPE: Consulting, Transportation Analysis

DATE: 2006

LOCATION: NH

ROLE: Project Manager, Lead Writer, Consultant

SUMMARY: Grant Alexander produced a report for the New Hampshire Department of Transportation analyzing the effects of the increase in the allowable weights on Interstate 89 and 93 in New Hampshire. There is a common public perception that an increase in weight limits will result in negative consequences from infrastructure damage to increased accident rates. Contrary to this perception, this report found the benefits of the weight limit increase to outweigh the costs. The quantifiable cost benefits result from two primary factors. The increased efficiency of heavier unit loads will lead to fewer truck trips. The increased weight limit will de-incentivize the use of less regulated secondary roadways resulting in improved safety and decreased wear on the pavement and bridges of those systems.