Understanding Probable Reasons for Freeway Ramp and Shoulder Parking by Truck Drivers: An Emerging Safety Issue to Oregon Highway Users

Commercial motor vehicle operators (i.e., truck drivers) are often unable to find safe and adequate parking. This issue is nationally recognized, specifically in Oregon, where high-use corridor rest areas and truck stops are suffering from a truck parking demand that exceeds capacity. Due to these severe shortages and limits on stays, drivers may be incidentally contributing to unsafe conditions by driving without a required break and/or parking on access ramps, shoulders, interchanges, and facilities running through cities or towns. Therefore, the current study seeks to uncover factors that lead to drivers ranking specific scenarios as probable reasons for freeway ramp and shoulder parking. This is accomplished using a stated-preference survey administered to drivers that deliver goods in the Pacific Northwest. Utilizing the random parameters ordered probit model (to account for the unobserved heterogeneity present in the survey data), several factors are found to impact the probability of ranking probable reasons. Findings show that driver characteristics, trip characteristics, parking difficulty, real-time information, effective parking improvements, and important parking features all influence the probability of ranking no nearby parking facility as a probable reason. Results from this work can be utilized to implement practice-ready solutions to address parking on freeway ramps and shoulders, as well as establish avenues for future truck parking related research.


  • English

Media Info

  • Media Type: Digital/other
  • Features: References; Tables;
  • Pagination: 9p

Subject/Index Terms

Filing Info

  • Accession Number: 01664152
  • Record Type: Publication
  • Report/Paper Numbers: 18-05304
  • Files: TRIS, TRB, ATRI
  • Created Date: Jan 8 2018 11:20AM