This afternoon I conducted a site visit of the Mac Robertson bridge walking under it first then walking over it from south to north and back again. What I noticed between 5-5.45 pm was the vast amount of vehicles using the bridge, including cyclists (most disobeyed the walk your bike across the bridge sign) and people doing their afternoon exercise. At the Richmond end, the bridge shakes with the number of cars driving over it, and congestion getting onto the bridge is a test of driver behavior.