Plants growing on or near these lines trap windblown sand to form new dunes. But remember to follow the tyre and vehicle manufacturers' recommendations. Reduce pressure just enough to give traction and re-inflate the tyres when conditions improve. Reduced tyre pressure will affect your vehicle's performance. Remember to avoid sharp turns, high speed driving and driving over rough surfaces when tyres are deflated, because tyres can roll off the rims, suddenly deflate or be damaged.
Pressure gauges are inexpensive.
Always carry one together with a pump to re-inflate your tyres on leaving the beach and before travelling on normal roads. Being prepared will help you get your vehicle out if you get bogged in soft sand. Carry a shovel, tow rope or traction aids. Before you drive on beaches you should find out about restrictions and the need for permits as regulations and controls relating to the use of recreational vehicles are in force along most of the Queensland coastline. Contact local councils for this information.