 St John Ambulance Australia emergency medical teams were also put on standby in case the accident was deemed as a major disaster and many more injured and fatalities had arisen.The Burnley Tunnel is long and comprises of cut and cover at the west portal, of driven tunnel, and of cut and cover at the east portal.The gradient at the west end is 6.2% downhill for traffic, then relatively level until a 5.2% grade out of the tunnel.