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Reliability
Reliability research in SHRP 2 focuses on reducing congestion through incident reduction, management, response, and mitigation. Achieving this goal will significantly improve travel time reliability for both people and freight. Projects that comprise the SHRP 2
Reliability Research Plan are shown in the Projects database, which is organized by project number. Click the project number for a description of the expected project activity.
Categories:
Click on a category for direct access to a section of the web page. Return to this section by clicking ‘back to top’.
Conferences
Publications
Webinars
Presentations: Travel Time Reliability—World View and SHRP 2
International Meeting, Jointly Organized by the International Transport Forum's Research Centre and SHRP 2
Posted May 20, 2011
In January 2011, SHRP 2 and the Joint Transportation Research Centre (JTRC) of the International Transport Forum (ITF) and the Organisation for Economic Co-operation and Development (OECD) cosponsored an international meeting on travel time reliability. This meeting was designed to bring together researchers and decision makers to examine recent research results both internationally and in the SHRP 2 Reliability focus area. The meeting began with the presentation of basic concepts of reliability, including definitions and performance measures. Sessions addressed both passenger and freight reliability, provided examples and case studies from countries around the world, described the progress that has been made in imputing economic value to travel time reliability and incorporating such values in the benefit–cost analysis, and compared and contrasted the methods of interim and final findings from the SHRP 2 Reliability research program and the JTRC’s study on reliability of surface transportation networks. The agenda and presentations from this meeting are available on the following
page.
Presentations from Value of Travel Time Reliability and Cost-Benefit Analysis Conference
October 15–16, 2009, Vancouver, Canada
Posted February 24, 2011
In October 2009, SHRP 2 and the Joint Transport Research Centre co-hosted an international meeting: Value of Travel Time Reliability and Cost-Benefit Analysis. The meeting brought together researchers and decision makers to examine recent research results and experiences on reliability measurement, valuation, and, in particular, to explore successful practices in integrating reliability into cost-benefit analysis. The meeting focused on identifying methodologies for incorporating reliability into transportation project evaluation and explored the pitfalls that need to be avoided. Presentations from the meeting can be found on the following
page.
Posters from 2009 TRB Annual Meeting
Posted February 26, 2009
If
you missed the SHRP 2 Reliability poster session at the 2009 TRB Annual
Meeting or would simply like another look, you can now find the
posters online
in PDF format, accompanied by a brief explanation of each poster.
Posters were presented by SHRP 2 staff and contractors for active
projects.
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New Project Brief: Improved Models for Better Decisions: Planning Models, Traffic Operations Models, and Activity-Based Models
Posted January 3, 2012
Decisions about spending public funds for transportation
improvements often are informed by estimates and forecasts developed
through mathematical models. The more closely these models represent
reality and include important influencing factors, the more confidence
we can have in spending decisions. Models that can provide a better
basis for predicting how highway improvements affect congestion, for
example, or that reflect the differences in forecasting freight demand
and passenger transportation will provide a more reliable picture of
future needs. This project brief
describes five projects from the SHRP 2 Capacity and Reliability focus
areas that are working to improve existing planning models, operations
models, and activity-based models.
Guide to Improving Capability for Systems Operations and Management (SHRP 2 Report S2-L06-RR-2)
Posted November 17, 2011
The purpose of SHRP 2 Report S2-L06-RR-2: Guide to Improving Capability
for Systems Operations and Management is to support transportation
agencies in developing institutional arrangements to meet the special
demands of congestion management, now emerging as a new transportation
agency priority. In particular, the strategies appropriate to effective
management of nonrecurring congestion present new challenges for agency
policy, organization and staffing, resources, and partnerships, as well
as for culture and leadership. This guide focuses on these special
institutional challenges with a change management tool called the
Institutional Capability Maturity Model. The model starts with agency
self-evaluation to determine the current circumstances and provides
incremental strategies for evolving toward institutional arrangements
most supportive of congestion management. Report S2-L06-RR-2 is
available online as an Adobe PDF document and in hardcopy through the TRB bookstore.
New Project Brief: Improving Travel Time Reliability
Posted October 12, 2011
Travel time reliability is an emerging topic that is increasingly important to understand because of the benefits it can offer. Reliable travel times are related to improved safety, efficiencies for freight transport, and improved quality of life for road users who experience less delay and frustration. Unreliable travel times are caused by recurring congestion (bottlenecks and poor traffic signal timing) and nonrecurring congestion (traffic incidents, weather, work zones, and special events). Managing these challenges and achieving the benefits of reliability will require a common understanding among transportation policy makers and professionals regarding the concept of travel time reliability and the methods by which it can be improved. SHRP 2 Reliability research is developing products that transportation professionals can use to improve travel time reliability. A new
project brief describes tools from SHRP 2 Reliability research to change business processes to support travel time reliability, to monitor travel time reliability and usefully preserve the data, to evolve the institutional arrangements of agencies, improve traffic incident scene management, and improve overall systems operations and management.
Integrating Business Processes to Improve Travel Time Reliability (SHRP 2 Report S2-L01-RR-1)
Posted October 3, 2011
Improving travel time reliability is an emerging business activity for
transportation agencies in the United States. To improve the reliability
of travel times on their roadway networks, transportation agencies must
advance on a number of fronts. These include collecting and analyzing
data; integrating travel time reliability considerations into planning,
programming, and project delivery; adopting innovative operational
strategies and technologies; and modifying their institutional
structures and business practices surrounding traffic operations. SHRP 2
Report S2-L01-RR-1: Integrating Business Processes to Improve Travel Time Reliability
addresses various ways that transportation agencies can reengineer
their day-to-day business practices to improve traffic operations,
address nonrecurring traffic congestion, and improve the reliability of
travel times delivered to roadway system users. Report S2-L01-RR-1 is
available online as an Adobe PDF document and in hardcopy through the TRB bookstore. This report, along with the accompanying guide (Report S2-L01-RR-2: Guide to Integrating Business Processes to Improve Travel Time Reliability)
and other SHRP 2 Reliability products related to institutional
structures and business process reengineering, is intended to help
transportation agencies move forward in addressing nonrecurring traffic
congestion and delivering more reliable travel times on their highway
networks.
Guide to Integrating Business Processes to Improve Travel Time Reliability (SHRP 2 Research Report S2-L01-RR-2)
Posted September 6, 2011
SHRP 2 Research Report S2-L01-RR-2:
Guide to Integrating Business Processes to Improve Travel Time Reliability
identifies influences that lead to process integration, common
obstacles faced when implementing process integration, and an outline of
the steps that can be referenced to implement and institutionalize
processes. The steps reflect the need to define specific reliability
goals, document current business processes and recommended changes,
implement a process, measure outcomes against reliability goals, and
institutionalize the process. The guide is not specific to any one
process. Its purpose is to assist any agency that is seeking to improve
travel time reliability through improved coordination and integration of
multiple processes and agencies. Report S2-L01-RR-2 is available online
as an Adobe PDF and in hardcopy through the TRB bookstore.
Feasibility of Using In-Vehicle Video Data to Explore How to Modify Driver Behavior That Causes Nonrecurring Congestion (SHRP 2 Report S2-L10-RR-1)
Posted August 25, 2011
SHRP 2 Report S2-L10-RR-1: Feasibility of Using In-Vehicle Video Data to Explore How to Modify Driver Behavior That Causes Nonrecurring Congestion presents findings on the feasibility of using data sets collected in naturalistic driving settings to make inferences about the relationship between observed driver behavior and nonrecurring congestion. General guidance is provided on the protocols and procedures for conducting video data reduction analysis. In addition, the report includes technical guidance on the features, technologies, and complementary data sets that researchers should consider when designing future instrumented in-vehicle data collection studies. Finally, a new modeling approach is advanced for travel time reliability performance measurement across a variety of traffic congestion conditions. Report S2-L10-RR-1 is available online as an Adobe PDF and in hardcopy through the TRB bookstore.
Brief for Reliability Project L13: Requirements
and Feasibility of a System for Archiving and Disseminating Data from
SHRP 2 Reliability and Related Studies
Posted June 7, 2011
In Project L13, a feasibility study was conducted to assess
the technical, economic, and business aspects of developing, operating,
and maintaining an archive for data from SHRP 2 Reliability and related
research projects. The archive would make this data accessible to
researchers and practitioners for up to 50 years. In the course of the
feasibility study, the research team developed three alternative
solutions for the data archive. The actual archive would be created and
implemented in Project L13A: Design and Implement a System for Archiving
and Disseminating Data from SHRP 2 Reliabilities and Related
Studies/Assistance to Contractors to Archive their Data for Reliability
Projects. This project brief summarizes the final report of the feasibility study, Project L13.
Brief for Reliability Project L01: A Guide to Improving Travel Time Reliability by Integrating Business Processes
Posted June 6, 2011
A goal of Reliability research in SHRP 2 is to identify ways
to reduce traffic congestion by improving highway operations and travel
time reliability. Reliability Project L01 addressed opportunities to
employ operational efficiencies by making it easier for transportation
and other agencies to coordinate their activities. The project produced a
Guide, which is summarized in this project brief,
and a final report that synthesizes successful practices. The Guide
will be useful to managers within state and local agencies that are
responsible for overseeing operations programs for traffic management,
maintenance, traveler, information, and incident response and
management.
SHRP 2 Report S2-L13-RW-1: Requirements and Feasibility of a System
for Archiving and Disseminating Data from SHRP 2 Reliability and Related
Studies
Posted June 1, 2011
SHRP 2 Report S2-L13-RW-1: Requirements and Feasibility of a System for
Archiving and Disseminating Data from SHRP 2 Reliability and Related
Studies provides an assessment of the feasibility of developing and
populating an online archive for the great variety and volume of data
being produced by the SHRP 2 Reliability focus area research program.
The goal of the archive, if feasible, is to provide researchers and
other interested parties with ready access to data needed to
independently validate the results of SHRP 2 Reliability research and to
conduct follow-on research. For this project, the term “data” was
defined in the broadest way possible to include statistical data,
analytical tools and models, written reports, pictorial data, and video
data.
Report S2-L13-RW-1
is available as an Adobe PDF document on the web. A 4-page Project
Brief that summarizes the project will also be available in the
Publications section of the SHRP 2 website. The follow-on project to
build and populate the archive is L13A: Design and Implement a System
for Archiving and Disseminating Data from SHRP 2 Reliabilities and
Related Studies/Assistance to Contractors to Archive their Data for
Reliability Projects.
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Recorded webinars are available on the SHRP 2 Webinar page.
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