Resources

Quantifying Countermeasure Effectiveness

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Wilson, Petritsch, Quantifying Countermeasure Effectiveness, Orlando, FL, PBIC, November 2008.

Pedestrian and bicycle professionals sometimes encounter resistance when proposing crash countermeasures, due either to competing interests along a corridor or the desire to cut costs. Quantifying the effectiveness of corridor-length countermeasures such as medians, lighting and bicycle lanes will help proponents make a better case for these elements.

Model Regulations and Plan Amendments for Multimodal Transportation Districts

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Williams, K. and K. Seggerman, Model Regulations and Plan Amendments for Multimodal Transportation Districts, National Center for Transit Research, Center for Urban Transportation Research, Tampa, FL, (2004)
This report includes suggested comprehensive plan amendment language and land development regulations that relate to access management in a multimodal environment.

Measurement and Comparison of Acceleration and Deceleration Zones at Traffic Control Intersections

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Boonsiripant, S., M. Hunter, K. Dixon and M.O. Rogers, “Measurement and Comparison of Acceleration and Deceleration Zones at Traffic Control Intersections,” Proceedings of the 89th Annual Meeting of the Transportation Research Board, ( 2010)

State Highway 6 Access Management Study North

  • Posted on: Sat, 07/06/2013 - 21:58
  • By: fbroen
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Case Studies Slide Titles SH 6 Access Management Study, North Study Area Land Uses Driveway Density LOS AM/PM Project History Continuous Public Involvement Public Involvement Exercises Traditional Access Management Tools Raised Medians Signal Modification Addition of Turn Lanes Traditional Access Management Tools Internal Circulation, added Backage Roads and Removal of Signals made Unnecessary Innovative Tools – more green time Innovative tools - Continuous flow intersection (CFI) Innovative tools – Median U-turn intersection Innovative tools Recommendations Results

Revitalizing Aging Highway Corridors

  • Posted on: Sat, 07/06/2013 - 21:54
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Revitalizing Aging Highway Corridors by Developing Context Zones and Access Management Standards Case Study Slide Titles US 1/US 78 Corridor Study Public Participation What happens if we do nothing? This could happen… Going from this…. To this, requires planning. What happens if we plan? We will improve safety and enhance mobility options… What happens if we do nothing? We create more issues that must be resolved… What happens if we plan? We improve traffic operations. Topics U.S. 1/U.S. 78 Corridor Study Area Augusta MPO Area U.S. 1/U.S.

Comprehensive AM Planning Is Key to Economic Sustainability

  • Posted on: Sat, 07/06/2013 - 21:50
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Case Studies Slide Titles Why Study is Needed Study Area Adjacent Freeway Design Freeway Footprint Why Study is Needed Land Use and Transportation Development Pattern - Nodal Land Use Considerations Existing Development Pattern Development Pattern Interchange/Intersection Recommendations Access Management Access Function Unoccupied Property Unoccupied Property Starlite Motor Lodge – low density along the highway English Village Inn Unoccupied Building Old Circuit City Old Michael’s Vacant Lot David’s Bridal Our highways has become America's “Main Street” Roadway Recommenda

A Basic Connection — Access Management and Sustainability

  • Posted on: Sat, 07/06/2013 - 21:47
  • By: fbroen
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Outline • Sustainability Definition • Need for Sustainable Transportation • Need for Access Management • Common Themes? • Qualitative Discussion • Rating Systems • Future Research • Conclusions Side Titles A Basic Connection: Access Management and Sustainability Outline Sustainability Definition Sustainability Definition Need for Sustainable Transportation Need for Access Management Common Themes?

Corridor Visualization Explorer

  • Posted on: Sat, 07/06/2013 - 19:51
  • By: fbroen
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Slide Titles

  1. Road Map
  2. How do you engage the problem?
  3. Think Show Ask
  4. What do you think?
  5. Next Steps
  6. Road Map
  7. Access Management
  8. Driveways
  9. Intersections
  10. Access Management improves safety by reducing traffic conflicts
  11. Tool
  12. Conflict Points
  13. Crashes
  14. Business revenue
  15. Road Map
  16. Think Show Ask

Access Management Framework Abu Dhabi U.A.E.

  • Posted on: Sat, 07/06/2013 - 19:46
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“The ultimate goal of this ambitious program is to transform Abu Dhabi into the sustainable capital of the Arab world.” The Abu Dhabi Department of Transport (DoT) was established in 2006 – combining agencies of Aviation, Maritime, Public Transport and Highways They are creating about 25 manuals – Current Status Change in Framework • Started with Manual (2010) – following TRB AM Manual, like they follow the Green Book, but directed switch to directive language – regulations. • May produce a training manual in the future.

Pylon Use; A National Survey

  • Posted on: Sat, 07/06/2013 - 19:44
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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?

Access Management Sight Distance Applications

  • Posted on: Sat, 07/06/2013 - 19:38
  • By: fbroen
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Overview • Review of Sight Distance Components • Common Sight Distance Applications to Access Management • Sight Distance – What, When, and Where • Concluding Remarks Slide Titles Another Look at Sight Distance Applications for Access Management Overview Sight Distance Review of Candidate Sight Distances Basic SSD Assumptions Review of Candidate Sight Distances Basic DSD Assumptions Review of Candidate Sight Distances Common Applications That Consider Sight Distance for Access Management Looking at Stopping & Decision Sight Distance Assumptions Basic Questions Stopping Sight Distance fo

Field Evaluation of Restricted Crossing U-Turn Intersection

  • Posted on: Sat, 07/06/2013 - 19:34
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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

Restricted Crossing U-Turn (RCUT) Intersection Safety Analysis

  • Posted on: Sat, 07/06/2013 - 19:01
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Restricted Crossing U-Turn (RCUT) Intersection Safety Analysis — The North Carolina Experience
North Carolina State University
AM1207Cunningham

Objectives
• Determine the safety and operational benefits of superstreets for NC motorists
• Fulfill the need for capacity and level of service methodology

Early Investigation of Access Points near Signalized Intersections

  • Posted on: Sat, 07/06/2013 - 18:57
  • By: fbroen
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Objective • Develop a statistical model to estimate the number of access point – related collisions occurring at access points near signalized intersections • Provide guidelines for site planners to distinguish higher collision sites from lower collision sites and eventually prevent constructing these sites Slide Titles Early Investigation of Access Points near Signalized Intersections Access Point Safety Objective Scope Literature Review Data Preparation Modeling Methodology Collision Model Higher Collision Sites Higher Collision Analysis Contributing Factors Recommended Guideline Research

Access Connection Issues — Permitting versus Retrofit

  • Posted on: Sat, 07/06/2013 - 18:48
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Access Management Regulations • Roadway Classification • Access Management Standards • Permitting Retrofit Projects • Cost is borne by the public • Benefits accrue to the public Conclusions • B/C criteria are applicable to retrofit projects • Warrants for permitting should be lower than for retrofit

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

Bridging the Gaps: How Quality and Quantity of a Connected Bikeway Network Correlates with Increasing Bicycle Use

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Birk, M. and R. Geller, “Bridging the Gaps: How Quality and Quantity of a Connected Bikeway Network Correlates with Increasing Bicycle Use,” Presented at the Transportation Research Board 85th Annual Meeting (2006)

Bibliography

A vast body of literature has been produced on the topic of access management, including research reports, peer reviewed papers, and government policy documents. In addition, the scope of the TRB Access Management Manual (AMM) is not only cross cutting, but has expanded further to address non-auto modes of transportation in more detail.

Incorporating Geometric Design Into Access Permit Regulations

  • Posted on: Wed, 07/03/2013 - 23:45
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We know that highways are the most dangerous facilities s on the face of the earth. AND we know that access related crashes represent over 55 percent of all reported accidents. We need to become more focused on Highway safety improvements In the last 10 years, over 430,000 dead. Guides and manuals are not enforceable – its actually the agencies engineering authority, usually through the chief engineer. It’s the opinion of the chief engineer, using guides and manuals as references, as compared to the wishes of the property owner.

Operational Impacts of Access Management

  • Posted on: Wed, 07/03/2013 - 17:25
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III. RESEARCH PROBLEM STATEMENT

Access management treatments inherently reduce conflict points along urban arterial roadways. The reduction in conflict has translated to a reduction in crashes that has been documented in numerous studies looking at “before” and “after” conditions when access management treatments (i.e., raised median installation, driveway consolidation) are implemented. Crash rate reductions as high as 50 percent have been reported in these analyses.

 

Access Management Near Modern Roundabouts: State of the Practice

  • Posted on: Wed, 07/03/2013 - 17:16
  • By: fbroen

Modern roundabouts have been shown to be a safe and efficient alternative to more traditional roadway intersection designs. They are much more efficient than signalized intersections in many situations in that traffic is allowed to remain in motion albeit at a slower speed. Safety is often improved since traffic speed through the roundabout is reduced and the most serious types of conflicts are reduced or eliminated.

AM Past Present Future

  • Posted on: Wed, 07/03/2013 - 17:07
  • By: fbroen
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Technological advances – transition from horse drawn carriages and cable cars to bicycles and automobiles. During the 1890s, cyclists and motorists launched a concerted movement for better roads.

SAM and AM

  • Posted on: Wed, 07/03/2013 - 16:54
  • By: fbroen
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I am AM. AM I am. That damn AM! That damn AM! I do not like that damn AM! Would you like to get there SAM? It can help you to your house. I can show you with my mouse. Do not bother with your mouse. I just want to be a grouse. I want my driveway here and there, I want my driveways everywhere. You can safely drive your car. You can drive from very far. Medians can make life grand -- If you can only understand. I do not care if you agree, I only want what pleases me, I want them here so fast, fast, fast, Why should I worry 'bout their cast? You will like AM, you'll see.

Safety Benefit of Raised Medians and Pedestrian Refuge Areas

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Federal Highway Administration (FHWA), Safety Benefit of Raised Medians and Pedestrian Refuge Areas, FHWA-SA-10-020, (2010) This document is an excellent summary of the safety benefits of medians for pedestrians, pedestrian access to transit stops, pedestrian crossing maneuvers, as well as benefits of medians in general. It includes several references that will be useful as well. It is of significant value to the AMM2 chapters and sections on impacts of access management techniques and pedestrians. Key findings are reproduced below.

NCHRP Synthesis 299

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The objective of this synthesis was to summarize the key findings of various geometric design research efforts published in the 1990s. In the decade following the publication of the 1990 edition of AASHTO’s A Policy on Geometric Design of Highways and Streets (also known as the Green Book), the research community conducted a large amount of research with potentially significant implications on safety and operations. The primary goal of this synthesis was to capture and distribute that information for consideration in the development of the 2004 edition of the Green Book.

Channelized Right-Turn Lanes

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NCHRP Project 03-89, “Channelized Right-Turn Lanes,” Active TRB Project. MRIGlobal submitted the final report for this project in July of 2011. As indicated in the summary for NCHRP Project 3-72, the study of the channelized right-turn lanes exceeded the available budget and so was deemed outside the scope of that project. Subsequently, NCHRP Project 03-89 then directly focused on the design and use of channelized right-turn lanes.

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