Contact Information: Neil Spiller at Neil.Spiller@dot.gov Traffic Bottlenecks Web Site
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U.S. Department of Transportation Federal Highway Administration Office of Operations (HOP) 1200 New Jersey Avenue, SE Washington, DC 20590 www.fhwa.dot.gov
Publication Number: FHWA-HOP-12-012
April 2012
Foreword
Introduction
When Did "Plan on Being Delayed" Become Part of Our Everyday Lexicon? Traffic, Like Weather, is an Ever-Evolving "Front" "Bottlenecks" and not "Insufficient Facilities" is Increasingly the Problem
When Did "Plan on Being Delayed" Become Part of Our Everyday Lexicon?
Traffic, Like Weather, is an Ever-Evolving "Front"
"Bottlenecks" and not "Insufficient Facilities" is Increasingly the Problem
Understanding Bottlenecks
What Exactly is a "Traffic Bottleneck"? "Good News" and "Bad News" About Fixing Bottlenecks Understanding Merging at Recurring Bottlenecks Merge Principles
What Exactly is a "Traffic Bottleneck"?
"Good News" and "Bad News" About Fixing Bottlenecks
Understanding Merging at Recurring Bottlenecks
Merge Principles
What is FHWA Doing to Promote Congestion Relief and Bottleneck Mitigation?
Recurring Congestion Program Strategies Nonrecurring Congestion Program Strategies The Localized Bottleneck Reduction Program – Focus on Recurring Congestion Benefits of Localized Bottleneck Improvements
Recurring Congestion Program Strategies
Nonrecurring Congestion Program Strategies
The Localized Bottleneck Reduction Program – Focus on Recurring Congestion
Benefits of Localized Bottleneck Improvements
Getting Started: How to Structure a Localized Bottleneck Reduction Program
What is Stopping Us From Fixing Bottlenecks? Overcoming Challenges to Implementing LBR Projects Options for Structuring a Bottleneck Improvement Program Potential Issues with LBR Bottleneck Treatments
What is Stopping Us From Fixing Bottlenecks?
Overcoming Challenges to Implementing LBR Projects
Options for Structuring a Bottleneck Improvement Program
Potential Issues with LBR Bottleneck Treatments
Identifying and Assessing Bottlenecks
Where are the Bottlenecks and How Severe Are They?
Localized Bottleneck Reduction Strategies
Types of LBR Treatments Innovative Intersection and Interchange Design Treatments
Types of LBR Treatments
Innovative Intersection and Interchange Design Treatments
Success Stories: How Agencies Are Deploying LBR Treatments and Developing Programs
Case Studies Successful LBR Program Development
Case Studies
Successful LBR Program Development
Want More Information?
Definitions
FHWA Matrix of Bottleneck Terms
Exhibit 1. Common Locations for Localized Bottlenecks
Exhibit 2. The Worst Physical Bottlenecks in the United States (2010)
Exhibit 3. Typical Section of MN I-35W Northbound Priced Dynamic Shoulder Lane (PDSL)
Exhibit 4. Examples of How Agencies Have Addressed Localized Bottleneck Issues
Exhibit 5. MnDOT Project Screening Process
Exhibit 6. Using Freeway Detector for Bottleneck Analysis
Exhibit 7. Using Vehicle Probe Data for Bottleneck Analysis
Exhibit 8. Vehicular Movements at a Continuous Flow Intersection
Exhibit 9. Crossover Movement in a DCD Interchange
Exhibit 10. Successful LBR Treatments – Austin, Texas
Exhibit 11. Successful LBR Treatments – Arvada, Colorado
Exhibit 12. Successful LBR Treatments – Saginaw, Michigan
Exhibit 13. Successful LBR Treatments – Metroplan MPO/Little Rock
Exhibit 14. Successful LBR Treatments – Pittsburgh, Pennsylvania
Exhibit 15. Success Spawns Success
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