Safety Effects of Median Modification Using Quick Kurb (QK)

  • Posted on: Tue, 10/08/2013 - 15:34
  • By: shroedermay
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Conclusions & Recommendations

  • Effective Temporary Median Treatment
  • Construction: Shorter Time and Less Cost
  • Safety Effects
  • Reduction on Left-Turn Related Crashes
  • Total Crashes: Reduced for most of applications except full median closure from bi-directional median opening
  • Benefit/Cost Ratio
  • Bi-directional Channelization: 8-12
  • One-directional Channelization: 3-5

 

Limitations & Next Step

Development of Left-Turn Warrants for Unsignalized Intersections

  • Posted on: Fri, 08/30/2013 - 23:14
  • By: fbroen
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Bill Eisele
Development of Left-Turn Warrants for Unsignalized Intersections
TTI

Purpose of NCHRP Project 3-91

  • Develop objective and clear process for selection of left-turn lanes at unsignalized intersections
  • Provide guidance on the design of left-turn lanes

Conclusions

Pylon Use; A National Survey

  • Posted on: Sat, 07/06/2013 - 19:44
  • By: fbroen
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A National Survey on Public Use in Freeways and Corridors Presentation Outline • Surveys • TxDOT Survey • Vendor Survey • National Survey • Format • Results • Interesting Findings Slide Titles Pylon Use: A National Survey Presentation Outline Survey Purpose Survey Format Terminology Vendor Interviews Survey Questions Survey Response Rate National Flexible Pylon Usage TxDOT District Pylon Usage Why Pylons Vs Barriers Other Reasons to use Pylons Pylons Vs Buffer Guidance Maintenance Reasons for Missing Pylons Maintenance Agencies Performing Evaluations Beneficial? When To Implement?

Field Evaluation of Restricted Crossing U-Turn Intersection

  • Posted on: Sat, 07/06/2013 - 19:34
  • By: fbroen
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Field Evaluation of Restricted Crossing U-Turn Intersection — The Maryland Experience Presentation Outline • The Safety Issue To Be Addressed • RCUT Concept • Suitable traffic conditions for RCUT implementation • Control parameters • FHWA Evaluation • Evaluation results • Conclusions Slide Titles Field Evaluation of Restricted Crossing U-Turn Intersection (RCUT) Presentation Outline The Safety Issue To Be Addressed RCUT Concept Suitable Traffic Conditions for Using RCUT RCUT Control Parameters U-Turn Opening Location FHWA Evaluation Driver Behavior Study Signing Study (minor road lanes not

Does Median Width Matter?

  • Posted on: Sat, 07/06/2013 - 18:43
  • By: fbroen
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Outline

  • Application of Differing Widths
  • Standards Summary
  • Geometric Impacts of Widths
  • Previous Safety Research
  • Highway Safety Manual Results
  • Applications of Existing CMFs
  • Future Research
  • Conclusions
     

Future Research

  • Before and After Study with Differing Widths
  • Statewide Data Review to update 1993 FHWA Report
  • Trends in Median Width Treatments

     

Conclusions