The works include site clearance and formation (including land decontamination works); reconstruction of Tong Yan San Tsuen Interchange; improvement to sections of existing Shan Ha Road, Long Hon Road and Tong Tai Road, and other road works; construction of associated works including water mains, drainage and sewerage works, subways, cycle tracks, footpaths, box culverts, nullah deckings, junction improvement works, slope works, retaining walls, landscaping works, electrical and mechanical works and other ancillary works; and implementation of environmental mitigation measures (including noise enclosures, noise barriers and low-noise road surfacing) and environmental monitoring works for the works mentioned above.