TEMPORARY LOSSES OF HIGHWAY CAPACITY AND IMPACTS ON
PERFORMANCE: PHASE 2
TEMPORARY LOSSES OF HIGHWAY CAPACITY AND IMPACTS ON
PERFORMANCE: PHASE 2
Title | Contents
| Acknowledgements | Exec.
Summary
1. Intro | 2.
Approach | 3. Crashes |
4. Breakdowns | 5.
Work Zones | 6. Weather
| 7. Signal Timing
8. RR Crossings
| 9. Toll Facilities
|
10. PUD
| 11. Results Summary
| 12. Next Steps | 13.
References
ES-1. Background
ES-2. Objective and Scope
ES-3. Approach
ES-4. Results
ES-5. Composite Picture and Next Steps
1.1 Background
1.2 Objective and Scope
1.3 Important Terms Used in This Report
1.4 Organization of the Report
2. Approach and General Methodology
2.1 Approach
2.2 Basic Concepts of Capacity, Capacity Reduction, and Delay
2.2.1 Determining Roadway Capacity
2.2.2 Estimating Capacity Reductions
2.2.3 Estimating Delays for Localized Events
2.3 Delay in the Context of Traffic Patterns and Other Factors
3.1.1 Assigning Crashes to the Highway Network
3.1.2 Estimating Capacity Reductions from Crashes
3.1.3 Estimating Delays Due to Crashes
3.3.1 Methodology
3.3.2 Data & Key Assumptions
4.1.1 Estimating the Total Number of Breakdowns
4.1.2 Assigning Each Breakdown to a Location in the
Highway Network
4.1.3 Assigning Temporal Characteristics to Each Breakdown
4.1.4 Assigning Each Breakdown a Location within the
Selected Link
4.1.5 Estimating Capacity Reduction
4.1.6 Estimating Delay
4.3.1 Methodology
4.3.2 Data & Key Assumptions
5.1.1 Identifying Work Zones
5.1.2 Estimating Loss of Capacity
5.1.3 Delays Due to Work Zones
5.3.1 Methodology
5.3.2 Data & Key Assumptions
6.1.1 Identifying Adverse Weather Conditions
6.1.2 Mapping Adverse Weather Conditions to Highway
Segments
6.1.3 Estimating Capacity Losses
6.1.4 Estimating Delay
6.2.1 TLC2 Results
6.2.2 Comparing TLC and TLC2 Results
6.3.1 Methodology
6.3.2 Data & Key Assumptions
7.1.1 Identifying Signal-Controlled Intersections
on Principal Arterials
7.1.2 Estimating Total Delay for Signal-Controlled
Intersections
7.1.3 Typical Delay Associated with Sub-optimal Signal
Timing
7.1.4 Typical Capacity Loss Associated with Sub-optimal
Signal Timing
7.2.1 Delay Due to Sub-optimal Signal Control
7.2.2 Capacity Losses Due to Sub-optimal Signal Control
7.3.1 Methodology
7.3.2 Data & Key Assumptions
8.1 Methodology
8.2 Results
8.3 Reliability
9.1.1 Identifying Toll Facilities and Their Locations
9.1.2 Determining the Number of Transactions at Each
Facility
9.1.3 Determining Toll Facility Type
9.1.4 Estimating Delay at Each Facility
9.3.1 Methodology
9.3.2 Data & Key Assumptions
10. Commercial Truck Pickup and Delivery (PUD) Activities in Urban Areas
10.1.1 Identifying Arterial Links and Assigning Them
to the Appropriate FHWA Urbanized Area
10.1.2 Estimating Weighted Average Capacity Reduction
and Delay per PUD Event on Each Link for Each Land Use Type
10.1.3 Estimating Weighted Average Delay per PUD
Event for Each Urban Area for Each Land Use Type
10.1.4 Estimating Annual Delay for Each Urban Area Based
on Number of PUD Events
10.3.1 Methodology
10.3.2 Data & Key Assumptions
11.1 Results
11.2 Comparing TLC2 Results to Others
11.3 A Composite Picture of Delay
12.1 Estimate Impacts from Simultaneous Capacity-Reducing
Events
12.2 Delphi Survey
12.3 Methodology for Analyzing Detailed Delay Estimates
12.4 Sensitivity Analyses
12.5 Methods for Estimating the 4 Rs
12.6 Assess Policy and Technology Impacts
12.7 Methodology Improvements
12.8 Data Improvements
12.9 Consider Publishing TLC Study as an Annual Report