A specially appointed committee of academic and policy experts has issued an interim report on its plans to plug data and research gaps that have for several years delayed federal policy recommendations for changes to truck size and weight limits.
The National Academies of Sciences, Engineering and Medicine study committee said it plans to “reduce uncertainties in estimates of the impacts of changes in truck size and weight limits.”
“The plan is to specify research projects, estimated costs and timelines for research in the areas of safety, enforcement, mode shift, bridges and pavements,” said the committee’s interim report, made public April 16. The committee plans to issue a final report outlining its “research road map” in the fall.
The committee, which began its work last summer, was appointed after a congressionally mandated U.S. Department of Transportation $2.3 million study failed to provide the needed research and data support to recommend increasing truck size and weight.
When the study was released in June 2015, then DOT Undersecretary Peter Rogoff sent a letter to congressional leaders indicating that the research “revealed very significant data limitations that severely hampered the Federal Highway Administration’s efforts to conclusively study the effects of the size and weight of various truck configurations.”
“At this time, the department believes that the current data limitations are so profound that the results cannot accurately be extrapolated to predict national impacts,” Rogoff said in his letter.
The study committee’s interim report:
• Summarizes research recommendations of past truck size and weight limit studies.
• Presents lists of candidate research problem statement topics on each of the five impact categories and on methods to evaluate alternative truck size and weight regulatory structures.
• Identifies criteria that the committee will take into account when deciding the priority of topics for inclusion in its research plan.
Committee Chairman James Winebrake, dean of the College of Liberal Arts at the Rochester Institute of Technology, said the committee plans to narrow down its nearly 50 specific “research problem statement topics” in the five impact areas that include pavement, safety, enforcement, mode shift and bridges.
“Not all of those topics will make it to the next round, where we start to sketch out a research program outline for each area,” Winebrake told Transport Topics. “The final report could include recommendations that the DOT collect additional data, conduct demonstration programs, establish new survey instruments or change some of its processes in order to collect better data.”