▁to ▁define ▁the ▁edge ▁of ▁the ▁tax i way ▁when ▁the ▁edge ▁does ▁not ▁correspond ▁with ▁the ▁edge ▁of ▁the ▁pav ement . ▁ ▁Cont inu ous ▁mark ings ▁consist ▁of ▁a ▁continuous ▁double ▁yellow ▁line , ▁with ▁each ▁line ▁being ▁at ▁least ▁ ▁in ▁width , ▁spac ed ▁ ▁apart . ▁They ▁divide ▁the ▁tax i way ▁edge ▁from ▁the ▁shoulder ▁or ▁some ▁other ▁ab ut ting ▁p aved ▁surface ▁not ▁intended ▁for ▁use ▁by ▁aircraft . ▁ ▁D ashed ▁mark ings ▁define ▁the ▁edge ▁of ▁a ▁tax i way ▁on ▁a ▁p aved ▁surface ▁where ▁the ▁ad jo ining ▁pav ement ▁to ▁the ▁tax i way ▁edge ▁is ▁intended ▁for ▁use ▁by ▁aircraft , ▁e . g . ▁an ▁apr on . ▁These ▁mark ings ▁consist ▁of ▁a ▁broken ▁double ▁yellow ▁line , ▁with ▁each ▁line ▁being ▁at ▁least ▁ ▁in ▁width , ▁spac ed ▁ ▁apart ▁( edge ▁to ▁edge ). ▁These ▁lines ▁are ▁ 1 5 ▁feet ▁( 4 . 6 ▁m ) ▁in ▁length ▁with ▁ 2 5 ▁foot ▁( 7 . 6 ▁m ) ▁g aps . ▁ ▁Tax i ▁Should er ▁Mark ings ▁Tax i ways , ▁holding ▁b ays , ▁and ▁apr ons ▁are ▁sometimes ▁provided ▁with ▁p aved ▁shoulders ▁to ▁prevent ▁bl ast ▁and ▁water ▁er os ion . ▁Should ers ▁are ▁not ▁intended ▁for ▁use ▁by ▁aircraft , ▁and ▁may ▁be ▁unable ▁to ▁carry ▁the ▁aircraft ▁load . ▁Tax i way ▁shoulder ▁mark ings ▁are ▁yellow ▁lines ▁per pend icular ▁to ▁the ▁tax