Great, 20km/h the whole beach, you'll need 2 tide changes to get to Waddy. It'll cause more damage to dunes as vehicles will need to exit the beach more often to avoid the incoming tide. 20km/h will mean more vehicles on the beach for longer periods, there will be lines of traffic on the beach putting baby chicks at further risk. There will be more night driving to take advantage of the tides, more baby chicks at risk.
Where will it end, baby chicks.