Case Study: Hawaii Department of Transportation achieves major energy savings with Johnson Controls

Hawaii Department of Transportation - Customer Case Study

The Hawaii Department of Transportation (HDOT) partnered with **Johnson Controls** to tackle a major challenge: reducing reliance on fossil fuels and cutting energy costs across Hawaii’s airports, harbors, and highways, where electricity costs are two to three times the U.S. average. As part of Hawaii’s broader sustainability goals, HDOT needed a large-scale energy strategy that could modernize critical transportation infrastructure while delivering guaranteed savings.

**Johnson Controls** implemented a massive energy savings performance contract spanning lighting, HVAC, solar PV, and maintenance upgrades. The project included replacing nearly 75,000 airport fixtures, installing 9,100 solar panels, adding marine-grade LED lighting at harbors, and upgrading 20,000 highway light fixtures. The result is $245 million in improvements with $680 million in guaranteed savings over the life of the contracts, including more than $500 million in airport savings, $44 million in harbor savings, and $126 million in highway savings, while also improving safety and freeing staff for higher-priority maintenance work.

Hawaii Department of Transportation

Governor David Ige

Hawaii Department of Transportation