HCM2010-Highway capacity manuals

Highway capacity -- United States -- Handbooks, manuals, etc.;Traffic engineering -- United States -- Handbooks, manuals, etc.;Traffic flow -- United States -- Handbooks, manuals, etc.1. ALTERNATIVE TOOL EXAMPLES FOR FREEWAY WEAVINGSEGMENTS271Determining the Weaving Segment Capacity……27-2Effect of Demand on Performance7-3Effect of Queue Backup from a Downstream Signal on the Exit Ramp..27-41. ALTERNATIVE TOOL EXAMPLES FOR FREEWAY RAMPS28Problem1:Ramp- Metering Effects…………28-1Problem 2: Conversion of leftmost lane to an HOV Lane28-41 INTRODUCTION2912. BASIC EXAMPLE PROBLEM CONFIGURATION…....……29-23. SIGNAL TIMING PLAN DESIGN29-4Deterministic stpd tools29-4Performance measures.29-5Initial Timing Plan Design.……29-7Initial Timing Plan Performance29-8Adjustments to Improve Progression Quality29-9Time-Space diagrams29-9Other graphic displays29-11Potential Improvements from Phasing Optimization29-154. EFFECT OF MIDSEGMENT PARKING ACTIVITIES .29-175. EFFECT OF PLATOONED ARRIVALS AT A ROUNDABOUT29206. QUEUE LENGTH ANALYSIS BASED ON VEHICLE TRAJECTORIES 29-23Queuing characteristics29-23BOQ Assessment…29-267. REFERENCES29-281. TRAFFIC DEMAND ADJUSTMENTS...30-1Capacity constraint and volume balance.30-1Origin-Destination Distribution30-3Spillback check30-52. SIGNALIZED SEGMENT ANALYSIS....1.30-11Discharge Flow Profile30-11Running Time…30-12Projected arrival flow profile30-12Proportion of Time blocked30-153. DELAY DUE TO TURNS.30-17Delay due to left turns30-17Delay due to right turns30-224. QUICK ESTIMATION METHOD30-26Introduction.…30-26a kecuirernents30-26Methodology .....30-27Example problem30-325. FIELD MEASUREMENT TECHNIQUES...............30-35Free-Flow Speed30-35Average Travel Speed30-366. COMPUTATIONAL ENGINE DOCUMENTATION......... 30-39Flow charts30-39Linkage lists.““··“·30-427. REFERENCES30-451. TRAFFIC SIGNAL CONCEPTS31-1Types of Traffic Signal Control........31-1Intersection Traffic Movements31-2Signal Phase Sequence……1.31-2Operational modes4.31-4Left-Turn Phase Sequence31-5Traffic Flow Characteristics31-62. CAPACITYAND PHASE DURATION..-.110Actuated phase duration31-10Lane group Flow Rate on Multiple-Lanc△ pproaches………31-30Pretimed phase duration31-37Pedestrian and Bicycle adjustment Factors31-423. QUEUE ACCUMULATION POLYGON........31-48Introduction….31-48Concepts…..........3148General procedure31-49Procedure for Selected Lane Groups…………31-514. QUEUE STORAGE RATIO31-68Introduction…31-68Concepts……….………31-68Procedure for Selected Lane Groups31-755. QUICK ESTIMATION METHOD....4.3183Introduction31-83Input Requirements………31-83Methodology……31-846. FIELD MEASUREMENT TECHNIQUES....4.31-97Field measurement of intersection control dela3197Field measurement of saturation Flow Rate31-1037. COMPUTATIONAL ENGINE DOCUMENTATION31-109Flowcharts.31-10Linkage lists31-1118. SIMULATION EXAMPLES……1-117Introduction1.31-117Effect of Storage bay overflow1.31-117Effect of Right-Turn-on-Red Operation..........31-119Effect of Short Through Lanes..31-122Effect of Closely spaced Intersections31-129. REFERENCES…,,4431-1251. SUPPLEMENTAL MATERIAL ON TWSC POTENTIAL CAPACITY..32-12. TWSC MOVEMENT CAPACITY ACCOUNTING FOR PEDESTRIANEFFECTS.32-3Step 6: Rank 1 Movement Capacity32-3Step 7: Rank 2 Movement Capacity. ..32-3Step 8: Compute Movement Capacities for Rank 3 Movements32-5Step 9 Compute Movement Capacities for Rank 4 movements32-63. TWSC SUPPLEMENTAL EXAMPLE PROBLEMS4.12-7TWSC Example Problem 3: Flared Approaches and Median Storage.32-7TWSC Example problem 4: TwSC Intersection Within SignalizedUrban Street SegmentTWSC Example problem 5: Six-Lane Street with U-Turns andPedestrians32-344. METHODOLOGY FOR THREE-LANE AWSC APPROACHES5. AWSC SUPPLEMENTAL EXAMPLE PROBLEMS..4.32-52Headway Adjustment Factor Calculation Details for AWSC ExampProblem 1······32-52AWSC Example Problem 2: Multilane, Four-Leg Intersection.4.32-531. SUPPLEMENTAL GUIDANCE33Variability and Uncertainty.……………………33-1Lane-Use Assignment…………33-1Capacity model calibration33-32. REFERENCES33-4