An Analytical Framework for Managed Lane Facility Performance Evaluation

Although managed lanes (MLs) are being implemented as a countermeasure against traffic congestion, limited information is available on how to best quantify their performance, especially in terms of their interaction with adjacent general-purpose lanes (GPLs). This paper presents a methodological framework that is consistent with the Highway Capacity Manual for analyzing freeway facilities with MLs and GPLs operating and interacting simultaneously. The proposed methodology incorporates features for performance assessment accounting for the unique attributes of ML facilities. A capacity reduction factor is developed to account for the cross-weave effect. The frictional effect caused by congestion in the adjacent GPLs is modeled and incorporated into a new set of speed-flow curves. The methodology allows users to calibrate or adjust freeway segment capacity based on traffic conditions and geometric information. By taking into account factors such as incidents or work zones, the proposed methodology can also evaluate alternative ML configurations and traffic patterns.


  • English

Media Info

Subject/Index Terms

Filing Info

  • Accession Number: 01450047
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Oct 23 2012 9:12AM