@article{Godavarthy:207115,
      recid = {207115},
      author = {Godavarthy, Ranjit and Russell, Eugene R. and Landman,  Dean},
      title = {Accommodating Oversize/Overweight Vehicles at Roundabouts:  Survey Results and Preliminary Designs},
      address = {2012-03},
      number = {1431-2016-118748},
      pages = {22},
      year = {2012},
      abstract = {There is considerable evidence that roundabouts are the  safest most efficient form of traffic control for most  intersections. The potential use of roundabouts with all  their inherent benefits may be greatly diminished because  they may not be able to accommodate oversize/overweight  (OSOW) vehicles sometimes called “Superloads”. To use these  OSOW vehicles as a design vehicle for roundabouts would be  very costly and inefficient, and more importantly, negate  the benefits of roundabouts which rely on being designed to  operate at slower speeds from adequate deflection. Large  roundabouts with little deflection and wide lanes would  encourage higher speeds which would likely reduce the  safety benefits. The problem, therefore, is how to  accommodate OSOW vehicles without sacrificing the  integrity, safety and other benefits of roundabouts. The  objective of the study was to survey and compile current  practice to fill in gaps in knowledge on the effects that  OSOW vehicles have on roundabout location, design, and  accommodation. The secondary objective of this study  includes using design software such as TORUS and Autoturn  to show the effects of OSOW on a prototype single lane  roundabout and a prototype double lane roundabout to  illustrate things that need to be considered for the types  of design modifications that may be necessary to  accommodate OSOW vehicles at roundabouts. A Total of 4  surveys have been conducted (2 successfully completed, 1  with very limited success and 1 in progress which is  expected to be very informative) with U.S State DOTs and  OSOW Haulers, and personal interviews with Roundabout  Design Consultants to compile various issues like bottle  necks on the highway system, problems of OSOW vehicles on  state’s highways and specifically at roundabouts, possible  design issues and mitigation strategies. This writing is  primarily from the results from the first 2 surveys  conducted with the 50 U.S States and preliminary designs to  mitigate OSOW problems at roundabouts.},
      url = {http://ageconsearch.umn.edu/record/207115},
      doi = {https://doi.org/10.22004/ag.econ.207115},
}