Set on 200 acres near Auburndale, Fla., the $150.8-million tolls testing facility features 11 miles of roadway infrastructure designed to replicate diverse driving environments and simulate real-world conditions for testing self-driving cars.

Johnson Bros. Corp. says Charlotte caused delays and provided inadequate plans, while the city counters that it's owed millions from the Texas-based contractor it says failed to complete punch list items and performed "poor work." 

The 5.4-mile Interstate 30 project in central Arkansas widens the highway to six lanes from four, a $187-million undertaking that’s part of the 36 projects approved by voters back in 2012.