1. TEMPLATE DESIGN © 2008 www.PosterPresentations.com About SHRP 2 L11 Travel Time Reliability Research 1) Current & Future User Needs SHRP2 L11 Study Objectives: To identify and evaluate strategies and tactics to satisfy the travel time reliability requirements of users of the roadway network – those engaged in both freight and person transport in urban and rural areas. Evaluating Alternative Operations Strategies to Improve Travel Time Reliability 2) Effectiveness of Transportation Agencies 4) Economic Benefits 5) Trends that Affect Reliability 6) Three Alternative Futures for 2030 7) Strategies and Tactics 8) Operations Concept for Present and Future 3) Goals for Improving Reliability Passengers Age Income Gender Education Employment Work Flexibility Children at Home Purpose: Routine & Temporally Constrained Mode: Single/Double Occupant, Transit, Multi-Modal Spatial: Urban/Rural, Distance, Facilities Temporal: Time of Day, Possibility of Adverse Weather Freight Movers Operational Characteristics Fleet Size: Small Fleet (Single Driver) Medium/Large Fleet Freight Characteristics: Perishable Part of Supply-Chain Travel Context Spatial: Urban/Rural Long-Haul or Urban only Point-point vs multiple Freeway/Arterial Usage Pricing Facilities Border Crossings Exclusive Lanes Temporal: Time of Day Possibilities for Adverse Weather Evaluate the current effectiveness of transportation agencies, incident responders, and other stakeholders in meeting user (passenger & freight) requirements. User Requirements Strategies Implementable by Agencies. Ability of Agencies to Implement Strategies under current, resource-constrained conditions. Qualitative Measurements to Rank Effectiveness of Strategies. SHRP 2 L11 Team Kittelson & Associates: John Zegeer, Principal Investigator Marais Lombard, Assistant Principal Investigator Research Team: Sivaramakrishnan (Siva) Srinivasan University of Florida Transportation Center Mark Hallenbeck Washington State Transportation Research Center Randal Pozdena ECONorthwest Dr. Joseph L. Schofer Northwestern University Dr. Michael Myer Georgia Institute of Technology Danica Rhoades Write Rhetoric SHRP2 Program: SHRP2 is a targeted, short-term research program aimed at addressing the challenges of moving people and goods efficiently and safely. Within the overarching aims of the SHRP2 program, the Reliability Focus Area aims to develop approaches, methods, and practices for improving the reliability of our transportation system by reducing the adverse consequences of nonrecurring congestion. Key SHRP2 L11 Deliverables Project Outcomes: 1) Generate profile of highway users & their need for travel time reliability. Draft Completed 2) Assess the effectiveness of transportation agencies in meeting reliability needs. Draft Completed 3) Develop goals & desired performance targets for travel time reliability. 4) Develop methods for estimating the value of travel time. 5) Identify trends likely to affect travel time reliability. 6) Develop three alternative scenarios for 2030, including an assessment of their impact on travel time reliability as well as its importance to users and operators. 7) Evaluate strategies for affecting travel time reliability. 8) Develop Concept of Operations for the present as well as for three alternative futures. User Surveys & Discussions Performance Targets 1)High-level, Qualitative Goals - based on important User requirements. 2)Quantitative Performance Measures for Each Goal - based on stakeholder needs & requirements, as well as existing conditions evaluation. Existing Measures Used Buffer Index - Difference between 95 th percentile travel time and average travel time, normalized by average travel time; Planning Time - The 95 th Percentile Travel Time Index; Percent trips with space mean speeds <= 50 mph; and Percent trips (section or O/D pair) w space mean speeds <=30 mph. Develop & carry out an approach for imputing the dollar value of incremental improvements in travel time reliability to enable evaluation of alternative operations strategies aimed at reducing non-recurring congestion. Evaluate Various Settings for measuring the value of reliability: Users/ Markets; Facilities – freeway/arterial; Levels of Ambient Congestion; Types & Sources of Congestion Assess Reliability for 1) the Network as well as 2) entire Transportation System. Identify comprehensive set of trends (internal and external) Screen potential trends and assess their relationship to non- recurring congestion and reliability Develop Working Paper Assess how these trends are influenced by factors internal and external to the Transportation Agency Technology Urban Sprawl or Densification Energy Costs Privatization Identify apparent and potential trends that may: Influence the transportation system & demands for it; Frequency of non-recurring congestion; Priorities placed on mitigation such congestion; Technologies that may facilitate effective responses; Broader social, environmental, and political context within which future transportation system will be managed. Global Climate Change Increasing & Aging Population Increases in Energy Costs Changes & Enhancements in Supporting Technologies Three Alternative Futures for 2030 List and discuss no-, low-, and high-tech strategies and tactics that can improve travel time reliability for the following: (1) those currently in use in the U.S. and other countries; (2) emerging strategies and tactics; (3) new and innovative strategies and tactics that could appear by the more distant future, 2030. Develop a Baseline Concept of Operations (Con Ops) for the present. Also, develop three distinct Concepts of Operations framed by different futures for the year 2030. Con Ops Document will Answer the Following: What - known elements & high-level capabilities of system; Where - geographical & physical extents of system; When - time-sequence of activities that will be performed; How - resources needed to design, build, operate & maintain system; Who - stakeholders involved with system & their respective responsibilities; and Why - justification for system, identifying what corridor currently lacks and what system will provide. Sources of Congestion Add Logos The objectives of this task are to classify users into groups and identify measures of travel-time reliability for each group. Identify a comprehensive set of trends regarding internal and external macro-level factors that affect travel time reliability in the present and the future.