Impact of trucks on arterial LOS and freeway work zone capability: part A

Freight traffic growth has contributed significantly to the growth in vehicle-miles traveled (VMT) as truck traffic has increased at a rate faster than person travel VMT. Trucks also have a disproportionate impact on roadway capacity. Depending on the context, a large truck can consume the equivalent of several cars worth of roadway capacity due to the physical size, the acceleration and other performance characteristics. The Highway Capacity Manual (HCM), the world's leading source for highway capacity and level of service determinations, provides a constant passenger car equivalent (PCE) factor of 1.5 cars for each heavy vehicle on a freeway and 2.0 cars for an arterial. A growing number of professionals question the validity of this overall number in relation to today's changing traffic environment. In stop-and-go traffic, large tractor trailers have a much slower start-up time than passenger cars. By being better able to account for the effects of trucks on the arterial system, it will be easier for planners and engineers to designate alternate routes which provide better and more reliable truck movement.


  • English

Media Info

  • Pagination: 96p

Subject/Index Terms

Filing Info

  • Accession Number: 01387460
  • Record Type: Publication
  • Source Agency: ARRB
  • Report/Paper Numbers: FDOT-54954-a-2007
  • Created Date: Aug 22 2012 10:29PM