Bill Frith (external) Road Safety Research Manager, WSP Jump to my Presentations & Publications Bill Frith is a transport researcher with Opus Research. He has co-authored publications with ViaStrada staff as shown below. Bill's Presentations & Publications Changing rural speed limits - Learning from the past Glen Koorey presented 'Changing Rural Speed Limits - Learning from the Past' at the 2017 IPENZ Transportation Group Conference. The paper, co … Read More See more of my presentations & publications