Evaluating Yielding Strategies at Bi-directional Single Lanes for Construction Vehicles

Earthwork is an essential part of heavy construction operation, and the operation has a high degree of mechanization with substantial acquisition and operating costs. Earthwork operations are normally carried out in confined work areas, and this gives the possibility for more precis operational planning. This paper examines different yielding strategies for autonomous construction vehicles at bi-directional single lanes in a real-world earthwork operation. Due to spatial constraints, parts of the transport roads are bi-directional single lanes which only allow vehicles travelling in one direction. The conflicts at the bi-directional single lanes cause disturbance in the operation, and thus affect the performance of the entire operation. Four different yielding strategies based on the vehicle’s task are proposed in this study. Using a Fleet Performance Simulation framework, the yielding strategies are modelled and simulated to examine and evaluate the transport efficiency performance of different yielding strategies. The transport efficiency of the earthwork operation is measured using indicators of productivity, queuing statistic and resource utilization. The simulation result shows that the transport efficiency indicators provide a valuable insight and are useful for identifying the bottleneck in the underlying operation. Using the same fleet, the productivity of the earthwork is increased by 26.5% with appropriate priority rule at the single lanes compared to the operation with no priority applied.


  • English

Media Info

  • Media Type: Digital/other
  • Features: Figures; References; Tables;
  • Pagination: 15p

Subject/Index Terms

Filing Info

  • Accession Number: 01763452
  • Record Type: Publication
  • Report/Paper Numbers: TRBAM-21-00140
  • Files: TRIS, TRB, ATRI
  • Created Date: Dec 23 2020 10:59AM