ARVADA — Scott Snyder balances a wireless speaker on his backyard fence, and with his tablet plays the soundtrack of a rushing highway he plucked off the internet. The ruckus emanating from the black box is an unpleasant harbinger of what Snyder fears is coming within 100 feet or so of his house — the long-contentious Jefferson Parkway, set to cut through the middle of his Leyden Rock neighborhood in northwest Arvada. Click to enlarge. “It’s Denver’s toll road to nowhere,” Snyder said, as he stared out at a wide trench lined on both sides with new homes where the $250 million highway designed to help bring the metro area’s beltway full circle will sit. Snyder’s neighbor, Michael Raabe, is more blunt about the proposed roadway, which could break ground next year and open for business in 2022. “This is really going to destroy this community,” he said. The Jefferson Parkway, four lanes wide and 10 miles long, will run between Rocky Mountain Metropolitan Airport in Broomfield and State Highway 93 north of Golden, skirting the eastern edge of Rocky Flats National Wildlife Refuge.