I-4 Mobility Partners is responsible for the investment, development and operation of the interstate highway known as I-4 Ultimate in Orlando, Florida, USA, part of a public-private partnership with the Florida Department of Transportation (FDOT). The Skanska subordinated debt of USD 43M, about SEK 390M, was repaid in 2023 following substantial completion.

The I-4 Ultimate project engineering and construction was performed through a joint venture led by Skanska and achieved substantial completion in February 2022. It involved the rebuild and widening of an approximately 34 kilometres (21 miles) stretch of I-4 through Orlando, adding four tolled express lanes, several sections of general-purpose lanes, reconstructing major interchanges, and replacing over 140 bridges. The modernization of this critical central Florida transportation corridor has alleviated congestion, improved safety, and shortened travel time for the passengers in over 200,000 vehicles daily.

I-4 Ultimate is the first infrastructure project in Florida, and first major interstate project in the U.S., to be awarded Envision's Platinum certification for design and construction. Among several other industry accolades, it was awarded as the OCEA Honor Award by the American Society of Civil Engineers (ASCE) for its safety, efficiency, and aesthetic enhancements.