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Guidelines on the Use of Auxiliary Through Lanes at Signalized Intersections (2011) / Chapter Skim
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Pages 1-5

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From page 1...
... Despite the relatively low utilization, ATLs provide significant benefits in terms of reduc ed vehicle delay. A nalysis of the field data shows that the presence of the ATL reduced delay by an average of 100 seconds per vehicle compared to the case with no ATL in place during the observational periods ( assuming all other factors remain equal )
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From page 2...
... This research found a strong correlation between congestion l evel and use of the ATL. This document presents guidelines that are a culmination of information gathered via a literature review, a survey of transportation practitioners, and an analysis of field data regarding ATLs, along with the research team's exper ience in the operation and design of signalized intersections.
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From page 3...
... Describes an approach for preparing a functional design plan for an ATL, provides a method for determining the minimum upstream and downstream ATL length, and presents guidance on signing and pavement markings for ATLs. Chapter 6: Sample Application.
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From page 4...
... L ay Out Individual Segments • • • • A pproaching AT L A pproaching S ignal Departing Intersection Merg e a t E nd of AT L ( Chapter 5)
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From page 5...
... Page 5 RECOMMENDED RESOURCE DOCUMENTS There are many other resources regarding the operations, design, and safety of intersecti on treatments that contain information relevant to the analysis and design of ATLs. The following resource documents should be used in the analysis and design of ATLs along with these g uidelines , and in addition to relevant local agency resources : • A Polic y on Geometric Design of Highways and Streets (AASHTO Green Book)
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Key Terms

  • pavement markings
  • atl length
  • departing intersection
  • downstream atl
  • field data

  • atl design
  • nalized intersections


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