 In the 1990s, population growth in Stanwood led to a 70 percent increase in traffic along some sections of SR 532.WSDOT conducted several corridor and traffic studies for the highway in the early 2000s, recommending that SR 532 be expanded to five lanes by 2022 to handle expected traffic growth.The Nickel gas tax program approved by the state legislature in 2005 included $84 million to fund a series of expansion and replacement projects along SR 532.