4WD-vehicles beach churn churned-up churning coast coastline colors colours conservation conserve conserving damage damaged damaging driving dug-up environment environmental environmentally-unfriendly four-wheel-drive marked marks ocean ocean-edge off-road off-road-driving prints protect protection rough safety sand soft-sand surface surfaced surfaces tire-tracks track tracks traction tyre-tracks vehicles vehicles-permitted wild around the bend bend cars commercial vehicle commute commuting curve direction four lanes left-hand driving light main road Motor Cycle perspectives road road rules road vehicles shade shaded Singapore speed three lanes traffic traffic flow traffic lanes travel tree-lined trees turn turn-off van wide wide road activity curved curving foot-prints grainy gray grey impressed impressions imprinted imprints indented over-printed patterns tangled terrain texture textured textures vehicle-tracks bridge bridges car drive highway mountain mountains roads barn black carriage cart country farm flowers Harness horse horses marathon pull race racing wagon wheels window