Specifications include, but are not limited to: • Realign and widen an existing two-lane arterial roadway to create a new five-lane roadway with bicycle lanes and sidewalks on both sides of 120th Avenue NE. • Remove and replace the existing culvert crossing of West Tributary underneath 120th Avenue NE. • Other improvements and work associated with the roadway widening include, but are not limited to,site preparation, erosion and sediment control, storm drainage system, flow control and water quality facilities, environmentally sensitive area impact mitigation, franchise utilities relocation, irrigation,landscaping, channelization, retaining walls, illumination, traffic signal systems, intelligent transportation systems, signing, traffic control, and other mitigation as required.