Bangkok's Smart City Serves 100K Daily with 250K Sensors

Bangkok just unveiled one of Southeast Asia's most ambitious sustainable city projects, and it's already changing how 100,000 people live and work each day.

One Bangkok spans 1.8 million square meters in the heart of Thailand's capital, blending offices, homes, hotels, shops, and cultural spaces into a fully integrated smart district. Behind the scenes, 250,000 IoT sensors manage everything from energy and water use to security and traffic flow.

The district earned LEED Platinum certification, Thailand's largest project to receive this top green building honor. Its centerpiece sustainability feature is a centralised cooling system that saves 17,000 megawatt-hours of electricity each year.

Hitachi, the technology partner behind One Bangkok, has been working with Thailand since 1936, when it delivered the country's first locomotive. Today, the company's projects touch millions of lives across the nation.

The Bangkok Red Line now carries 200,000 passengers daily, easing congestion with help from Hitachi's European Train Control System and gas-insulated grid connection. These upgrades improved safety, efficiency, and capacity across the entire rail network.

At Saha Industrial Park in Sriracha, Hitachi developed Thailand's largest private microgrid, helping the country move toward renewable energy and smarter power systems. The company's Lumada platform uses AI and machine learning to help manufacturers optimise planning, maintenance, and inventory management.

The Ripple Effect

These infrastructure wins are creating opportunities far beyond Bangkok. Hitachi Energy is investing 455 million Thai baht to expand its transformer factory in Samutprakarn, boosting production capacity by 60 percent to meet urgent demand for grid equipment.

Metro riders across 53 stations on the Blue and Purple Lines can now tap contactless bank cards to pay, eliminating the hassle of cash and physical top-ups. The system makes public transit more accessible for both residents and visitors.

"Every milestone was achieved together, showing the strength of our collaboration," said Kojin Nakakita, Chairman of Hitachi Asia Ltd. "The most rewarding moments come from seeing the positive impact our work has on the people of Bangkok and the environment."

The combination of digital technology and operational expertise is tackling real challenges while creating jobs, reducing emissions, and improving quality of life for millions across Thailand.

Thailand's vision for a greener, smarter future is already here, transforming cities one sensor at a time.