This volume contains specialist papers covering the M5 East Motorway: variation from Bexley Road to General Holmes drive (zoning); variation from Bexley Road to General Holmes Drive (land use and social impacts); tunnelling; soils and groundwater; construction and operational activities on fish and decapods in wetlands habitats; Padstow to Botany/Mascot Aboriginal heritage; air quality assessment; visual assessment; traffic analysis for the variation; Bexley Road and Cooks River, flora and fauna; wetlands habitats; European heritage issues; tunnel exhaust stack designs and hydrology, hydraulics and water quality.