Original sentence: Recent improvements to the Northern Motorway (which have also included a bus expressway) have greatly reduced travel times from the North Shore to Orewa, while at the same time extending Auckland's urban sprawl  into southern Rodney District
Edited sentence: Recent improvements to the Northern Motorway (which have also included a bus expressway) have greatly reduced travel times from the North Shore to Orewa, while at the same time effectively extending Auckland's urban sprawl into southern Rodney District