Traffic Engineering and Control

  1. Intersection Control and Design
    1. Intersection Types and Characteristics
      1. At-Grade Intersections
        1. Three-Leg Intersections
          1. T-Intersection Configurations
            1. Y-Intersection Layouts
              1. Design Considerations
              2. Four-Leg Intersections
                1. Cross Intersection Design
                  1. Skewed Intersections
                    1. Offset Intersections
                    2. Multi-Leg Intersections
                      1. Complex Intersection Design
                        1. Traffic Management Challenges
                          1. Geometric Considerations
                        2. Grade-Separated Interchanges
                          1. Diamond Interchanges
                            1. Conventional Diamond
                              1. Tight Diamond
                                1. Single Point Urban Interchange
                                2. Cloverleaf Interchanges
                                  1. Full Cloverleaf
                                    1. Partial Cloverleaf
                                      1. Loop Ramp Design
                                      2. Directional Interchanges
                                        1. Direct Connection Design
                                          1. Flyover Structures
                                            1. High-Speed Applications
                                            2. Other Interchange Types
                                              1. Trumpet Interchange
                                                1. Roundabout Interchange
                                                  1. Turbine Interchange
                                                2. Roundabouts
                                                  1. Single-Lane Roundabouts
                                                    1. Geometric Design
                                                      1. Capacity Analysis
                                                        1. Safety Performance
                                                        2. Multi-Lane Roundabouts
                                                          1. Lane Configuration
                                                            1. Signing and Marking
                                                              1. Operational Considerations
                                                              2. Mini-Roundabouts
                                                                1. Application Guidelines
                                                                  1. Design Standards
                                                                    1. Conversion Considerations
                                                                2. Intersection Geometric Design
                                                                  1. Design Principles
                                                                    1. Design Vehicle Selection
                                                                      1. Sight Distance Requirements
                                                                        1. Turning Movement Accommodation
                                                                        2. Intersection Layout
                                                                          1. Approach Alignment
                                                                            1. Intersection Angle
                                                                              1. Corner Radius Design
                                                                              2. Channelization
                                                                                1. Traffic Islands
                                                                                  1. Median Design
                                                                                    1. Turn Lane Configuration
                                                                                    2. Pedestrian Facilities
                                                                                      1. Crosswalk Design
                                                                                        1. Pedestrian Islands
                                                                                          1. Accessibility Requirements
                                                                                        2. Unsignalized Intersection Analysis
                                                                                          1. Control Types
                                                                                            1. Two-Way Stop Control
                                                                                              1. Priority Assignment
                                                                                                1. Capacity Analysis
                                                                                                  1. Delay Estimation
                                                                                                  2. All-Way Stop Control
                                                                                                    1. Application Warrants
                                                                                                      1. Capacity Determination
                                                                                                        1. Operational Analysis
                                                                                                        2. Yield Control
                                                                                                          1. Yield Sign Applications
                                                                                                            1. Gap Acceptance Analysis
                                                                                                          2. Gap Acceptance Theory
                                                                                                            1. Critical Gap Concepts
                                                                                                              1. Follow-Up Time
                                                                                                                1. Driver Behavior Modeling
                                                                                                                  1. Factors Affecting Gap Acceptance
                                                                                                                    1. Driver Characteristics
                                                                                                                      1. Geometric Conditions
                                                                                                                        1. Traffic Conditions
                                                                                                                      2. Capacity Analysis Methods
                                                                                                                        1. Highway Capacity Manual Procedures
                                                                                                                          1. Conflicting Volume Analysis
                                                                                                                            1. Service Volume Calculations
                                                                                                                            2. Level of Service Analysis
                                                                                                                              1. Control Delay Measurement
                                                                                                                                1. LOS Criteria
                                                                                                                                  1. Queue Length Estimation
                                                                                                                                2. Signalized Intersection Analysis
                                                                                                                                  1. Signal Timing Fundamentals
                                                                                                                                    1. Cycle Length Definition
                                                                                                                                      1. Phase Structure
                                                                                                                                        1. Simple Phases
                                                                                                                                          1. Complex Phases
                                                                                                                                            1. Overlapping Phases
                                                                                                                                            2. Interval Timing
                                                                                                                                              1. Minimum Green Time
                                                                                                                                                1. Yellow Change Interval
                                                                                                                                                  1. All-Red Clearance Time
                                                                                                                                                  2. Lost Time Components
                                                                                                                                                    1. Start-Up Lost Time
                                                                                                                                                      1. Clearance Lost Time
                                                                                                                                                        1. Total Lost Time
                                                                                                                                                      2. Capacity Analysis
                                                                                                                                                        1. Saturation Flow Rate
                                                                                                                                                          1. Base Saturation Flow
                                                                                                                                                            1. Adjustment Factors
                                                                                                                                                              1. Lane Width
                                                                                                                                                                1. Heavy Vehicles
                                                                                                                                                                  1. Grade
                                                                                                                                                                    1. Parking
                                                                                                                                                                      1. Bus Blockage
                                                                                                                                                                        1. Area Type
                                                                                                                                                                          1. Lane Utilization
                                                                                                                                                                            1. Left-Turn Movements
                                                                                                                                                                              1. Right-Turn Movements
                                                                                                                                                                                1. Pedestrian Effects
                                                                                                                                                                              2. Volume-to-Capacity Ratio
                                                                                                                                                                                1. Critical Volume-to-Capacity Ratio
                                                                                                                                                                                2. Level of Service Analysis
                                                                                                                                                                                  1. Control Delay Components
                                                                                                                                                                                    1. Uniform Delay
                                                                                                                                                                                      1. Incremental Delay
                                                                                                                                                                                        1. Initial Queue Delay
                                                                                                                                                                                        2. Delay Calculation Methods
                                                                                                                                                                                          1. LOS Determination
                                                                                                                                                                                            1. Queue Length Analysis
                                                                                                                                                                                            2. Special Considerations
                                                                                                                                                                                              1. Pedestrian Signal Timing
                                                                                                                                                                                                1. Bicycle Signal Timing
                                                                                                                                                                                                  1. Transit Priority
                                                                                                                                                                                                    1. Emergency Vehicle Preemption
                                                                                                                                                                                                  2. Traffic Signal Design and Timing
                                                                                                                                                                                                    1. Phase Plan Development
                                                                                                                                                                                                      1. Movement Analysis
                                                                                                                                                                                                        1. Conflict Identification
                                                                                                                                                                                                          1. Phase Sequencing
                                                                                                                                                                                                          2. Protected vs Permitted Operations
                                                                                                                                                                                                            1. Left-Turn Phasing Options
                                                                                                                                                                                                              1. Protected Only
                                                                                                                                                                                                                1. Permitted Only
                                                                                                                                                                                                                  1. Protected-Permitted
                                                                                                                                                                                                                  2. Right-Turn Phasing
                                                                                                                                                                                                                  3. Timing Parameter Calculation
                                                                                                                                                                                                                    1. Minimum Green Time
                                                                                                                                                                                                                      1. Change and Clearance Intervals
                                                                                                                                                                                                                        1. Yellow Change Interval
                                                                                                                                                                                                                          1. All-Red Clearance Interval
                                                                                                                                                                                                                          2. Pedestrian Timing
                                                                                                                                                                                                                            1. Walk Interval
                                                                                                                                                                                                                              1. Pedestrian Clearance Time
                                                                                                                                                                                                                            2. Cycle Length Optimization
                                                                                                                                                                                                                              1. Webster's Method
                                                                                                                                                                                                                                1. Practical Constraints
                                                                                                                                                                                                                                  1. Coordination Requirements
                                                                                                                                                                                                                                  2. Green Time Allocation
                                                                                                                                                                                                                                    1. Proportional Method
                                                                                                                                                                                                                                      1. Critical Lane Volume Method
                                                                                                                                                                                                                                        1. Optimization Techniques
                                                                                                                                                                                                                                        2. Signal Coordination
                                                                                                                                                                                                                                          1. Arterial Progression
                                                                                                                                                                                                                                            1. Time-Space Diagrams
                                                                                                                                                                                                                                              1. Offset Optimization
                                                                                                                                                                                                                                                1. Bandwidth Analysis
                                                                                                                                                                                                                                                  1. Network Coordination

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                                                                                                                                                                                                                                              6. Traffic Control Devices

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                                                                                                                                                                                                                                              8. Capacity and Level of Service Analysis