Interstate: Interstate 10 completed; I-11 construction begins

Interstate 10 In 1980, the section of Interstate 10 that passed through central Phoenix was still in the design process. The final rural segment of the highway had been completed west of the city, but traffic was forced onto surface streets from Lower Buckeye Road to west of Avondale. That stretch, which included the Deck Park Tunnel, turned out to be a $500 million project, making it the most expensive freeway segment on the interstate system back then. By comparison, it will cost $1.75 billion...