New Continuous Approximation Models for Passenger and Freight Transportation [Research Brief]

Details

• Creators:
  Carlsson, John Gunnar
• Corporate Creators:
  Pacific Southwest Region 9 UTC, University of Southern California
• Corporate Contributors:
  United States. Department of Transportation. University Transportation Centers (UTC) Program ; United States. Department of Transportation. Office of the Assistant Secretary for Research and Technology
• Subject/TRT Terms:
  • Routing
  • Logistics
  • Freight and passenger services
  • Trip chaining
  • Vehicle routing
  • last mile delivery
• Resource Type:
  Brief
• Geographical Coverage:
  United States
• Edition:
  Research Brief
• Corporate Publisher:
  METRANS Transportation Center (Calif.)
• Abstract:
  The purpose of this project has been to design simple and concise mathematical models for quantifying the reductions in vehicle miles travelled (VMT), among other cost measures, that result from implementing modern logistics systems with complex features such as ridesharing, crowdsourcing or teleworking. Traditionally, these problems have been solved in a discrete setting, involving fixed sets of (for example) demand points, time periods, and service facility locations; one then solves them with an integer mathematical programming solver. A drawback of this approach is that solving large-scale instances would require enormous computational efforts which likely increase exponentially with the problem instance size. A further drawback is that such models are often extremely complex, which hinders understanding of salient problem features and managerial insights.
• Format:
  PDF
• Funding:
  69A3551747109
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/67556/dot_67556_DS1.pdf
• File Type:
  [PDF - 323.04 KB]
• Collection(s):
  University Transportation Centers
• Main Document Checksum:
  urn:sha-512:0c31c363c20a1d6dc1f6c7377ceb633cc5a0ce919e80515ead4a1c144b29f06eb4b648aeb6249e68857947aa284fde520e622601dba26b92856cbdc4a6c22572