, ▁fruit ▁st all , ▁h uts ▁( w ak af ) ▁and ▁public ▁tele ph ones . ▁However , ▁some ▁lay b ys ▁may ▁have ▁a ▁few ▁food ▁st alls ▁and ▁pet rol ▁stations . ▁Usually , ▁there ▁are ▁about ▁two ▁lay b ys ▁in ▁between ▁every ▁two ▁R S As . ▁ ▁Over head ▁restaur ants ▁– ▁Over head ▁restaur ants ▁are ▁special ▁R S As ▁with ▁restaur ants ▁above ▁the ▁express way . ▁Un like ▁typical ▁lay b ys ▁and ▁R S As ▁which ▁are ▁only ▁accessible ▁in ▁one - way ▁direction ▁only , ▁an ▁overhead ▁restaurant ▁is ▁accessible ▁from ▁both ▁directions ▁of ▁the ▁express way . ▁There ▁are ▁three ▁overhead ▁brid ges ▁in ▁Malays ia ▁– ▁S ung ai ▁Bul oh ▁( N orth – S outh ▁Express way ▁Northern ▁Route ), ▁A yer ▁Ker oh ▁( N orth – S outh ▁Express way ▁Southern ▁Route ) ▁and ▁US J ▁( N orth – S outh ▁Express way ▁Central ▁Link ). ▁The ▁PL US ▁Art ▁Gallery ▁is ▁located ▁in ▁A yer ▁Ker oh ▁Over head ▁Bridge ▁R estaur ant . ▁ ▁Customer ▁Service ▁Centre ▁( C SC ) ▁– ▁Every ▁to ll ▁pla za ▁in ▁Malays ia ▁has ▁a ▁customer ▁service ▁centre . ▁This ▁centre ▁includes ▁highway ▁maps , ▁to ll ▁fare ▁lists , ▁information ▁coun ters , ▁Touch ▁' n ▁Go ▁card ▁reload ▁coun ters , ▁Touch ▁' n ▁Go ▁and ▁Sm art ▁T AG ▁sales ▁coun ters ▁and ▁more . ▁ ▁Touch ▁' n ▁Go ▁Hub ▁–