Riyadh Sedra Infrastructure Project in the desert

The Riyadh Sedra Infrastructure Project in Saudi Arabia, undertaken by CCCC Second Harbor Engineering Co, is a key civil engineering project under "Saudi Vision 2030". Aimed at developing the infrastructure of Sedra New City, it comprises four major components–pipelines, electricity, roads, and landscaping.

Situated in a tropical desert, the region experiences extreme heat, creating significant safety challenges. The team initially used conventional thermometers but realized they overlooked factors such as humidity and radiation. To provide accurate warnings, they introduced a "Five-in-One Environmental Measuring Instrument" that calculates the "heat stress index" in real-time.

They also launched a "Four-Color Flag" warning system: green (caution), yellow (extra caution), orange (danger), and red (extreme danger). Each flag corresponded to different work intensities and rest requirements, helping workers recognize risks and adjust their work accordingly. Although promoting this system initially encountered resistance, repeated demonstrations and data-driven persuasion led to its eventual acceptance by the workers.

In July 2024, the system issued a warning that helped save a worker from heatstroke, demonstrating the practical effectiveness of the "Golden 3-5-10 Rescue Procedure", which is "3 minutes to cool down, 5 minutes for medical intervention, and 10 minutes for transportation to the medical institution".

The project team received a "10 Million Safe Working Hours" milestone certificate in July 2025, recognizing their outstanding safety management capabilities in extreme environments.