Understanding the IRC Code: IRC 99-2018 - Guidelines for Traffic Calming Measures in Urban and Rural Areas

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Ensuring road safety while maintaining efficient traffic flow is a critical challenge in urban and rural areas. The IRC Code 99-2018, published by the Indian Roads Congress (IRC), provides comprehensive guidelines for traffic calming measures to enhance road safety and reduce vehicle speeds in both urban and rural settings. This blog delves into the key aspects of the IRC 99-2018, highlighting its significance, major recommendations, and implementation strategies.

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What is IRC Code 99-2018?

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The IRC 99-2018 outlines essential measures for traffic calming, which involve physical design interventions to slow down or control vehicle movement, reducing the risk of accidents. It applies to roads in both urban and rural environments, focusing on pedestrian safety, speed reduction, and accident mitigation.

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Objectives of IRC 99-2018

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• Enhancing road safety by reducing vehicle speeds.

• Minimizing accidents in high-risk areas.

• Improving pedestrian and cyclist safety.

• Balancing traffic movement while ensuring accessibility.

• Mitigating the impact of high-speed vehicles on residential and commercial zones.

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Key Traffic Calming Measures Recommended in IRC 99-2018

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1. Speed Reduction Techniques

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The guideline emphasizes various speed management strategies, including:

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• Speed breakers – Properly designed humps to control speed.

• Rumble strips – To alert drivers and slow down traffic.

• Chicanes – Alternating curb extensions to reduce speeds.

• Raised pedestrian crossings – Enhancing pedestrian visibility and safety.

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2. Lane Narrowing and Road Design Adjustments

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• Chokers – Reducing lane width at specific points.

• Curb extensions – Enhancing pedestrian safety at intersections.

• Center medians and refuges – Providing safe waiting areas for pedestrians.

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3. Roundabouts and Traffic Circles

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• Replacing traditional intersections with roundabouts to minimize accident risks and slow traffic.

• Encouraging smooth traffic movement while ensuring safety at junctions.

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4. Signage and Road Markings

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• Clear warning signs before traffic calming measures.

• Zebra crossings and lane markings for proper guidance.

• Use of reflectors and luminous road signs for night visibility.

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5. Use of Smart Traffic Control Measures

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• Speed monitoring cameras to enforce speed limits.

• Intelligent traffic signals to control congestion.

• LED speed displays warning drivers about their speed levels.

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Implementation Strategies for Urban and Rural Areas

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In Urban Areas

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• Traffic calming is critical near schools, hospitals, markets, and residential zones.

• Implementation of pedestrian zones and no-entry areas for vehicles.

• Use of barriers and signal-controlled pedestrian crossings to manage foot traffic.

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In Rural Areas

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• Managing speeds on highways passing through villages and settlements.

• Installing warning signs and speed-reducing measures before accident-prone areas.

• Providing safe pedestrian crossings and proper lighting in low-visibility zones.

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Benefits of Implementing Traffic Calming Measures

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• Reduces road accidents and fatalities.

• Enhances pedestrian safety, especially in congested areas.

• Controls noise and air pollution caused by high-speed vehicles.

• Improves quality of life in residential neighborhoods.

• Ensures smoother traffic flow with minimal disruptions.

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Conclusion

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IRC Code 99-1988 provides essential guidelines for the effective use of speed breakers on minor roads, ensuring that they serve their purpose of controlling vehicular speeds while maintaining safety and comfort for all road users. By adhering to these guidelines, traffic engineers and local authorities can create safer road environments, particularly in residential and high-traffic areas.

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