When managing traffic control during rain, consider these safety measures:

• Traffic Control Plan: Develop and implement a written traffic control plan to protect workers from traffic hazards 8, 10. This plan should be readily available for reference by workers 8, 10.
• Warning Signs: Use appropriate warning signs to alert drivers of the work zone 2, 8.
• Barriers and Lane Control: Use barriers and lane control devices to separate traffic from the work area 2, 8.
• Flashing Lights and Flares: Deploy flashing lights and flares to enhance visibility, especially in low-light conditions 2, 8.
• High-Visibility Apparel: Ensure all workers exposed to traffic wear high-visibility safety apparel 2, 8. Traffic controllers should wear apparel that clearly identifies them and is retroreflective if visibility is poor [1].
• Designated Signallers: Use designated signallers to direct traffic, especially if other methods are inadequate 2, 8. Ensure signallers are trained and equipped with reflectorized paddles and lights for signaling in poor visibility 3, 9.
• Vehicle Lights: Require vehicles to operate with headlights turned on at all times [2].
• Speed Limits: Establish and enforce maximum allowable speeds for vehicles within the work zone [3].
• Communication: Maintain effective communication between signallers and equipment operators, especially when hand signals are insufficient 8, 16.
• Equipment: Ensure machines are equipped with adequate lighting systems 5, 6, 11 and that visual aids like CCTV and mirrors are clean and functional 5, 6, 11.
• Ground Conditions: Be aware that rain can cause the ground to become loose or unstable, increasing the risk of machine rollover [4].
• MUTCD Compliance: Ensure traffic control devices and signage comply with the Manual of Uniform Traffic Control Devices (MUTCD) 14, 20.