 More recently, the city has installed experimental bike boxes that allow bicyclists to wait ahead of motorized traffic at red lights.An important milestone in Portland's utility cycling infrastructure was the expansion of the sidewalks of Hawthorne Bridge in 1997, which significantly improved the safety and ease of bicycle commuting across the Willamette River.In 2004, a bike path along the Sunset Highway between Sylvan and Cedar Hills was completed, helping to link Beaverton and downtown Portland.