▁to ▁soft ▁sand ▁( e . g . ▁road ▁registered ▁passenger ▁vehicles ▁and ▁boat ▁tra ilers ). ▁ ▁Con crete ▁st airs ▁are ▁commonly ▁fav ored ▁on ▁be aches ▁adjacent ▁to ▁population ▁cent ers ▁where ▁beach ▁users ▁may ▁arrive ▁on ▁the ▁beach ▁in ▁street ▁sho es , ▁or ▁where ▁the ▁for esh ore ▁road way ▁is ▁substantial ly ▁higher ▁than ▁the ▁beach ▁head ▁and ▁a ▁r amp ▁would ▁be ▁too ▁ste ep ▁for ▁safe ▁use ▁by ▁ped est ri ans . ▁ ▁A ▁composite ▁st air ▁r amp ▁may ▁incorpor ate ▁a ▁central ▁or ▁side ▁st air ▁with ▁one ▁or ▁more ▁ram ps ▁allowing ▁ped est ri ans ▁to ▁lead ▁bug g ies ▁or ▁small ▁boat ▁dol lies ▁onto ▁the ▁beach ▁without ▁the ▁aid ▁of ▁a ▁power ed ▁vehicle ▁or ▁win ch . ▁ ▁Con crete ▁ram ps ▁and ▁steps ▁should ▁be ▁maintained ▁to ▁prevent ▁a ▁bu il dup ▁of ▁m oss ▁or ▁alg ae ▁that ▁may ▁make ▁their ▁wet ▁surfaces ▁sli pp ery ▁and ▁dangerous ▁to ▁ped est ri ans ▁and ▁vehicles . ▁ ▁Cord uro y ▁( be ach ▁lad der ) ▁A ▁cord uro y ▁or ▁beach ▁lad der ▁( or ▁board ▁and ▁chain ) ▁is ▁an ▁array ▁of ▁pl anks ▁( us ually ▁hard wood ▁or ▁treated ▁tim ber ) ▁laid ▁close ▁together ▁and ▁per pend icular ▁to ▁the ▁direction ▁of ▁traffic ▁flow , ▁and ▁secured ▁at ▁each ▁end ▁by ▁a ▁chain ▁or ▁cable ▁to ▁form ▁a ▁path way ▁or ▁r amp ▁over ▁the ▁sand ▁d une . ▁