Guidelines for the Design of Interchanges in Urban Areas
IRC 92-1985 provides comprehensive guidelines for the design of interchanges in urban areas, focusing on grade-separated intersections to facilitate free-flowing traffic on highways. It covers the selection of interchange types, geometric design standards, ramp configurations, and traffic flow considerations, tailored for urban highway engineers and planners. The standard is essential for designing efficient, safe, and cost-effective interchanges accommodating mixed traffic volumes and urban constraints.
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1985Edition
Roads and Bridges IRC- Indian road congress Category
IRC 92-1985 provides comprehensive guidelines for the design of interchanges in urban areas, focusing on grade-separated intersections to facilitate free-flowing traffic on highways. It covers the selection of interchange types, geometric design standards, ramp configurations, and traffic flow considerations, tailored for urban highway engineers and planners. The standard is essential for designing efficient, safe, and cost-effective interchanges accommodating mixed traffic volumes and urban constraints.
Audience
Who Uses This Standard
Highway Design Engineers
Urban Traffic Planners
Transportation Consultants
Civil Engineers specializing in Road Infrastructure
Municipal and State Highway Authorities
Road Safety Analysts
Construction Project Managers
Contents
Key Topics Covered
✓Grade separation and interchange fundamentals
✓Types of interchanges (diamond, cloverleaf, loop, semi-direct)
✓Traffic flow analysis and design peak hour considerations
✓Ramp design including acceleration and deceleration lanes
✓Geometric design standards for ramps and terminals
✓Clearance requirements for underpasses and overpasses
✓Selection criteria for interchange types based on site conditions
✓Location and design of ramp terminals
✓Weaving sections and their impact on capacity and safety
✓Cost-benefit considerations in interchange design
✓Design speed, horizontal curvature, and sight distance for ramps
✓Flexibility for future expansion and traffic growth
Structure
Table of Contents
1Introduction▼
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2Definitions▼
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3Warrants for Interchange▼
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4Type of Interchanges▼
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5Geometric Design Standards for Interchange Elements▼
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6Design of Interchanges▼
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Frequently Asked
Popular Questions About IRC 92
?What are the different types of interchanges recommended for urban areas?▼
Detailed answer not available.
?How should ramp acceleration and deceleration lanes be designed according to IRC 92?▼
Detailed answer not available.
?What criteria determine the selection of the road to be elevated in an interchange?▼
Detailed answer not available.
?How does the standard address clearance requirements for underpasses and overpasses?▼
Detailed answer not available.
?What traffic flow factors and vehicle equivalency are considered in interchange design?▼
Detailed answer not available.
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