Highway Capacity Manual 2000

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Highway Traffic and Safety Analyses
Lecture 9 Highway Capacity Manual 2000 (original
presentation by R. Dowling revised and expanded
by A. Tarko)
Purdue University School of Civil
Engineering West Lafayette
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Lecture Objectives

• To highlight the content of the Year 2000 edition
  of the Highway Capacity Manual.
• To help identify suitable procedures in the
  Manual things and properly apply to traffic
  operations problems.

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Purpose of the HCM

• To provide transportation practitioners and
  researchers with a consistent system of
  techniques for the evaluation of the quality of
  service on highway and street facilities.
• HCM does not set policies regarding a desirable
  or appropriate quality of service

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HCM 2000 Formats

• Book
• Five parts, 35 chapters
• CD-ROM
• Book
• Audio-visual tutorials
• CD-ROM presentation

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HCM 2000 Table of Contents

• Part I - Overview
• Part II - Concepts
• Part III - Methodologies
• Part IV - Corridor and Areawide Analyses
• Part V - Simulation and Other Models

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Part II. Concepts

• Describes factors affecting LOS.
• Identifies required input.
• Suggests default values for input.
• Provides service volume tables

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HCM Components
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HCM Components and Structure

• Chapter 9 is Your Gateway to the HCM
• Exhibit 9-1 lists facility types and components.
• The same exhibit gives Part II and Part III
  chapter references for each facility type.
• Chapter 9 Provides Guidance on
• Use of defaults.
• Use of or development of service volume tables.
• Precision and accuracy of results.

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Chapter 9 Structure of HCM
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Chapter 9 Structure of HCM
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Part III. Methodologies

• Provides Methodologies to Compute
• Level of Service, Delay, Queues
• Contents
• Freeway Facilities (4 chapters)
• Urban Streets (3 chapters)
• Highways (2 chapters)
• Pedestrian Bikeways (1 chapter)
• Transit (1 chapter)

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Intersection Control
14
Required Data for Signals
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Level of Service Criteria
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Level of Service Criteria
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Transit LOS Criteria
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Part IV. Corridor/Areawide

• Purpose
• How to adapt HCM to planning models
• Multi-Modal Corridor Analysis
• Computation of intensity, duration, extent of
  congestion (for performance measures)
• Areawide Analysis
• Capacity analysis for planning models
• Speed-flow and node delay equations for models

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Part V. Simulation

• Purpose
• Guidance on the use of simulation for conditions
  beyond the bounds of Part III.
• Contents
• Chapter 31. Simulation and Other Models
• Introduction to simulation techniques

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Using the HCM 2000

• Determine Facility Type
• See Exhibit 9-1, Chapter 5 Definitions
• Exhibit 29-2 provides summary.
• Review Concepts, Inputs, Defaults
• Review relevant Part II chapter.
• Conduct Analysis
• Apply relevant Part III chapter.
• Interpretation of Results
• See Chapter 9 discussion on precision.
• See end of Part III Chapter for sensitivity
  discussion

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CD ROM Tutorials

• 4. Delay 335
• 9. Control Delay at Signalized
• Intersections 550
• 20. Bicycle Events and Hindrance 305
• 21. Bicycle LOS by Facility Types 410
• 32. Transit Quality of Service 505

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Highway Capacity Software

• No official TRB approved software
• FHWA sponsored software (2)
• Windows (Catalina),
• EZ-HCS written in JAVA
• Other developers
• McTrans, Strong Concepts, Dowling, KLD, etc.