Effects on Riverside Park Neither option will affect the access to Riverside Park and the new set of traffic lights currently being built on Central Coast Hwy Option 5 consists of changes around the Grieve Close area, with an underpass joining Justfrute Drive and Grieve Close, allowing people to access both industrial areas without having to cross the Central Coast Hwy, Manns Road, Brisbane Water Drive intersection Have Your Say Have your say on the intersection upgrade by contacting the RTA project team on 1800 115 418 (free call during business hours) or visit Central_Coast_Office@rta.nsw.gov.au