Guidelines for Traffic Forecast on Highways (First Revision)
IRC 108:2014 provides comprehensive guidelines for forecasting traffic on Indian highways, covering methodologies for analyzing base year traffic, estimating growth factors, and projecting normal, developmental, and generated traffic for future horizon years. It is essential for traffic engineers, planners, and highway project managers involved in designing, evaluating, and planning highway infrastructure to ensure capacity and economic viability based on realistic traffic demand forecasts.
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2014Edition
Roads and Bridges IRC- Indian road congress Category
IRC 108:2014 provides comprehensive guidelines for forecasting traffic on Indian highways, covering methodologies for analyzing base year traffic, estimating growth factors, and projecting normal, developmental, and generated traffic for future horizon years. It is essential for traffic engineers, planners, and highway project managers involved in designing, evaluating, and planning highway infrastructure to ensure capacity and economic viability based on realistic traffic demand forecasts.
Audience
Who Uses This Standard
Traffic Engineers
Transportation Planners
Highway Project Managers
Civil Engineers specializing in Road Design
Government Road Authorities
Consultants in Transportation Engineering
Urban and Regional Planners
Contents
Key Topics Covered
✓Base Year Traffic Analysis
✓Primary and Secondary Traffic Surveys
✓Estimation of Traffic Growth Factors
✓Normal, Developmental, and Generated Traffic Forecasting
✓Use of Passenger Car Units (PCU) for Traffic Composition
✓Impact of Toll on Traffic Volume
✓Horizon Year Transport Network Updates
✓Traffic Demand Elasticity and Economic Indicators
✓Traffic Volume Variation by Time and Season
✓Estimation of Diverted Traffic Using Logit Models
✓Design Hourly Volume and Capacity Considerations
✓Methodologies for Forecasting in Urban and Rural Contexts
Structure
Table of Contents
1Scope▼
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2Basic Concepts and Overview of Forecasting Process▼
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3Identification of Primary Traffic Surveys and Their Locations▼
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4Analysis of Base Year Travel▼
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5Estimation of Growth Factors for Normal Traffic▼
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6Normal Traffic Forecast▼
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7Developmental Traffic Forecast▼
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8Generated Traffic Forecast▼
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9Horizon Year Transport Network▼
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10Impact of Toll on Traffic Volume▼
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11Application Examples and Case Studies▼
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12Terminology and Abbreviations▼
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13References and Data Sources▼
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14Committee and Personnel Involved▼
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15Annexures and Sample Formats▼
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Frequently Asked
Popular Questions About IRC 108
?What types of traffic surveys are recommended for establishing base year traffic data?▼
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?How are growth factors for normal traffic estimated and validated?▼
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?How does the standard address the impact of tolls on traffic volume forecasts?▼
Detailed answer not available.
?What methodologies are suggested for forecasting generated and developmental traffic?▼
Detailed answer not available.
?How should traffic composition and vehicle categories be accounted for in forecasts?▼
Detailed answer not available.
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