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Highway Capacity Manual

Highway Capacity Manual. Highway Capacity Manual (HCM). Most widely referenced and best selling document of the Transportation Research Board HCM 2000: 16,000+ copies sold worldwide Model for similar capacity manuals in other countries. Purpose of the HCM.

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Highway Capacity Manual

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  1. Highway Capacity Manual

  2. Highway Capacity Manual (HCM) • Most widely referenced and best selling document of the Transportation Research Board • HCM 2000: 16,000+ copies sold worldwide • Model for similar capacity manuals in other countries

  3. Purpose of the HCM Provide a set of methods and procedures for evaluating multimodal performance of highway and street facilities in terms of operational measures and QOS or LOS indicators. Objectives: • Define performance measures and survey methods for traffic characteristics • Provide methods for estimating and predicting performance measures • Explain effect on multimodal transportation

  4. Levels of Analysis Operations Design Planning/Preliminary Engineering Travel Modes Auto Pedestrian Bicycle Transit (multimodal urban street) Spatial Coverage Points Segments Facilities Temporal Coverage Undersaturated Oversaturated Intended Use

  5. Targeted Users • Engineers – Traffic Operations And Highway Design • Transportation Planners • HCM also useful to: • Management personnel • Educators • Noise and air quality specialists • Elected officials (“HCM for Dummies”) • Regional land use planners • Special interest groups

  6. 1950 First document to quantify capacity Published by Bureau of Public Roads 1965 Level of Service concept introduced Chapter on bus transit Published by Highway Research Board History

  7. 1985 “Modern” HCM Transportation Research Board (TRB) Further refined LOS concept Major research since 1965 Signalized intersections  LOS based on stopped delay Urban Arterials method and chapter Expanded transit chapter Pedestrian, bicycle chapters Updates: 1992, 1994, 1997 History (cont.)

  8. Substantial increase in volume and breadth Systematic and consistent basis for assessing capacity and LOS Point, facility, corridor/area-wide analyses 1,200 pages HCM 2000

  9. HCM 2010 • Volumes 1 – 3 printed • Volume 4 – Web-based only

  10. HCM 2010 (cont.) • Points, Segments, Facilities, Systems • Multimodal (Urban Street) • Quality of Service (from the traveler perspective) • Freeway Systems • Planning Applications • Active & Transportation Demand Management • Travel Time Reliability

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