TRB AHB65 OPERATIONAL EFFECTS OF GEOMETRICS TRANSPORTATION RESEARCH BOARD COMMITTEE

Transcription

1 TRB AHB65 OPERATIONAL EFFECTS OF GEOMETRICS TRANSPORTATION RESEARCH BOARD COMMITTEE

2 AHB65 Committee Scope and Objectives O The AHB65 committee is concerned with highway geometric design as related to traffic operations and safety. The committee seeks to: O Improve the body of knowledge and understanding of the safety and operational effects of highway geometrics and the state of the art of tools for quantifying those effects, and O Facilitate the application of the best available knowledge, understanding, and tools in practice.

3 AHB65 Subcommittees Technical O Freeway O High Speed Roadways O Low to Moderate Speed Roadways O Intersections (joint) O Performance-Based Design O Traffic Speed and Safety (joint)

4 AHB65 Subcommittees O Research O Paper Awards Activity O Urban Street Symposium (joint) O International Symposium on Highway Geometric Design (joint)

5 TRB Geometric Design Committee (AFB10) C OMMITTEE S COPE AND S TRUCTURE

6 Scope This committee focuses on expanding knowledge regarding highway h and street geometric design elements that affect safe and efficient operations for all users and contexts. The committee develops research needs statements and communicates findings that advance design criteria, guidance, methods, and performance-based roadway design objectives. The committee facilitates domestic and international dialogues and idea exchanges between researchers and practitioners while supporting emerging and developing professionals.

7 Committee Structure

8 Strategic Research Needs Brainstorm Research Needs Santa Fe, NM 2002 Form Methodology, Highways, Freeway/Interchanges, & Streets/Intersections Technical Groups to update plan January 2009 TRB Mid-year Meeting Research Needs Planning/Updates Woods Hole, MA July 2009 Form Steering Committee Plan Geometric Design Research Needs Workshop Prepare 22 Research Needs Statements TRB E-circular E-110 January 2007 Prepare Updated Research Needs Document Prepare 7 White Papers Strategic Research Needs Workshop Williamsburg, VA 2004

9 Chair: Jeff Jones, Tennessee DOT Vice-Chair: Jim Rosenow, Minnesota DOT Secretary: Brooke Struve, FHWA AASHTO Liaison: Keith Platte

10 AASHTO Board of Directors 52 members, one from each member Department of Transportation Sets association policy President: Kirk T. Steudle, Michigan DOT Vice President: Vice-President: Michael P. Lewis, Rhode Island DOT

11 (Secretary of Transportation from each State DOT) Standing Committees (11) Aviation Highways (SCOH) Public Transportation Railroads Water Transportation ti Environment Finance/Administration Planning Performance Mgmt Research Safety Subcommittees (9) Bridges and Structures Construction ti Design Highway Transport Maintenance Materials Right of Way and Utilities Systems Operation and Management Traffic Engineering

12 1. Geometric Design 2. Cost Estimating 3. Environmental Design 4. Hydrology & Hydraulics 5. Non-Motorized Transportation 6. Pavement (Joint Committee) 7. Pre-construction Engineering Management 8. Project Delivery (Joint Committee) 9. Roadside Safety 10. Roadway Lighting (Joint Committee) 11. Truck Size and Weight (Joint Committee) 12.Value Engineering 13. Electronic Engineering Data (Joint Committee)

13 Region Organization Name Maryland Eric Marabello Massachusetts Stanley Wood Region 1 New Hampshire Don Lyford Vacant TBA Arkansas Mike Fugett Georgia Brent Story Region 2 Tennessee Jeff Jones Virginia Bart Thrasher Iowa Deanna Maifield Kansas Jim Brewer Region 3 Minnesota Jim Rosenow Ohio Rick Bruce New Mexico Max Valerio Oklahoma Reza Amini Region 4 Oregon Kent Belleque South Dakota Mark Leiferman APWA Marshall Elizer County Engineers Joe Ruffer FHWA Brooke Struve National League of Cities Robert Wunderlich NYNJ Port Authority Reza Maleki 6/27/2012 AASHTO Technical Committee on Geometric Design

14 NY NJ Port Authority FHWA AASHTO APWA County Engineers National League of Cities 6`

15 1. Geometric Design of Highways and Streets (Green Book), Accommodation of Utilities Within Freeway Right-of-Way, A Policy on Design Standards - Interstate System, Guide for Accommodating Utilities Within Highway Right-of-Way, Guide for the Planning, Design, and Operation of Pedestrian Facilities, Geometric Design of Very Low-Volume Local Roads (ADT 400), Guide for Development of Rest Areas on Major Arterials and Freeways, Guide for Protective Screening of Overpass Structures, Informational Guide on Fencing Controlled Access Highways, /27/2012 AASHTO Technical Committee on Geometric Design

16 org/pages/default aspx 6/27/2012 AASHTO Technical Committee on Geometric Design

17 National Cooperative Highway Research Program G D GEOMETRIC DESIGN RESEARCH

18 RECENT PUBLICATIONS NCHRP Report 674: Crossing Solutions at Roundabouts and Channelized Turn Lanes for Pedestrians with Vision Disabilities NCHRP Report 687: Guidelines for Ramp and Interchange Spacing NCHRP Report 707: Guidelines on the Use of Auxiliary Through Lanes at Signalized Intersections NCHRP Synthesis 412: Speed Reduction Techniques for Rural High to Low Speed Transitions NCHRP Synthesis 417: Geometric Design Practices for Resurfacing, Restoration, and Rehabilitation

19 RECENT PUBLICATIONS (CONT.)( ) NCHRP Synthesis 422: Trade Off Considerations in Highway Geometric Design NCHRP Synthesis 432: Recent Roadway Geometric Design Research for Improved Safety and Operations NCHRP Legal Research Digest 57: Tort Liability Defense Practices for Design Flexibility NCHRP Web Only Design and Management of Historic Roads NCHRP WbO l G i th Di t T th A NCHRP Web Only Going the Distance Together: A Citizen s Guide to Context Sensitive Solutions for Better Transportation

20 RECENTLY SELECTED PROJECTS NCHRP , Life Cycle Cost of Various Intersection Control Strategies NCHRP 07 23, Access Management in the Vicinity of a Freeway Interchange NCHRP 15 47, An Assessment of Geometric Design Policies and Processes NCHRP 15 48, Developing a Methodology for Designing Low and Intermediate Speed Roadways that Serve All Users NCHRP , Geometric Design Guidelines for Managed Lanes NCHRP 15 50, Update to TRB Special Report 214: Designing Safer Roads Practicesfor Resurfacing, Restoration and Rehabilitation

21 UPCOMING PUBLICATIONS NCHRP 03 89, Design Guidance for Channelized Right Turn Lanes NCHRP 03 91, Left Turn Accommodations at Unsignalized Intersections NCHRP 03 99, Development and Application of Access Management Guidelines NCHRP 15 31A, Design Guidance for Freeway Mainline Ramp Terminals NCHRP 15 40, Design Guidance for High Speed to Low Speed Transition Zones for Rural Highways NCHRP 15 42, Recommended Bicycle Lane Widths for Various Roadway Characteristics

22 CRITICAL ACTIVE PROJECTS NCHRP , Design Guidance for Intersection Auxiliary Lanes (Jul 2013) NCHRP , Unsignalized Intersection Guide (Mar 2014) NCHRP , Design Guidance for Interchange Loop Ramps (Pending) NCHRP 15 34A, Performance Based Analysis of Geometric Design of Highways and Streets (Pending) NCHRP 15 39, Superelevation Criteria for Sharp Horizontal lcurves on Steep Grades (Sep 2012)

23 CRITICAL ACTIVE PROJECTS (CONT.)) NCHRP 15 41, Sag Vertical Curve Design Criteria for Headlight Sight Distance (Oct 2012) NCHRP 15 45, Proposed Update of the AASHTO Guide for the Planning, Design, and Operation of Pedestrian Facilities (Jul 2014) NCHRP 17 53, Evaluation of the 13 Controlling Criteria for Geometric Design (Mar 2013) NCHRP 17 59, Safety Impacts of Intersection Sight Distance (Nov 2014) NCHRP 20 07/296, Alignment of the Draft AASHTO Transit Guide with the AASHTO Green Book (Nov 2012) NCHRP 22 21, Median Cross Section Design for Rural Divided Highways (Jul 2012)

24 HTTP :// TRB. ORG /NCHRP

25 FHWA Update To Joint Meeting of TRB AFB10, AHB65, and ANB25 & AASHTO Technical Committee on Geometric Design June 27, 2012

26 Updates on: Ongoing Research Active Safety RD&T Solicitations Highway Safety Manual Activities

27 Ongoing Research Intersections ti Field and safety evaluations of Mini roundabouts Double Crossover Diamond Interchanges S f t l ti f t li i d Safety evaluation of access management policies and techniques

28 Ongoing Research Roadway Departure Update of Low Cost Treatments for Horizontal lcurve Safety Effective design and placement of cable barrier systems

29 Ongoing Research Speed Management Informational report on Methods to Achieve Safe Speeds High friction pavement surfaces Optical speed bars Allocation of lane width and shoulder width Evaluation of dynamic speed feedback signs on curves

30 Ongoing Research Pedestrian & Bicyclist Evaluation of pedestrian safety engineering countermeasures at urban and suburban midblock crossing locations f f d i idbl k Human factors assessment of pedestrian midblock behavior

31 Ongoing Research Human Factors Driver behavior at horizontal curves Complex interchanges Driver expectations when navigating Improving signing and markings

32 Active Safety RD&T Solicitations Development of CMFs Precipitating and Predisposing Factors in Rural Two Lane Crashes Reducing Roadway Departure Crashes at Horizontal Curve Sections on Two Lane Rural Highways Advancing Innovative Intersections Safety Treatments for Two Lane Rural Highways Tools, Training, and Technical Assistance for Local Rural and Tib Tribal lroad dpractitioners

33 Highway Safety Manual Activities Implementation Support Implementation Guide for Managers Integrating the HSM into the Highway Project Development Process CMFs in Practice Training and Technical Assistance Analysis Tools/Resources IHSDM ISATe CMF Clearinghouse Research and Development

34 For More Information Ongoing research Active Safety RD&T solicitations Highway Safety Manual activities safety.fhwa.dot.gov/hsm