es ▁are ▁usually ▁about ▁half ▁the ▁width ▁of ▁a ▁normal ▁l ane ▁on ▁the ▁North – S outh ▁Express way ▁and ▁are ▁position ed ▁on ▁the ▁extreme ▁left ▁side ▁of ▁the ▁main ▁carriage way ▁in ▁each ▁direction ▁of ▁travel . ▁These ▁special ▁lan es ▁are ▁found ▁in ▁Shah ▁Al am ▁Express way , ▁But ter worth – K ul im ▁Express way , ▁Federal ▁Highway ▁and ▁Gut hr ie ▁Cor rid or ▁Express way ▁ ▁Emer gency ▁ph ones ▁– ▁Emer gency ▁ph ones ▁are ▁located ▁every ▁ 2   km ▁along ▁inter state ▁express ways ; ▁useful ▁if ▁there ▁are ▁break down s ▁on ▁the ▁express way . ▁Att end ants ▁from ▁the ▁nearest ▁to ll ▁pla za ▁will ▁to w ▁the ▁broken ▁cars ▁to ▁the ▁nearest ▁work sh ops . ▁ ▁T unnel ▁emer gency ▁ex its ▁( V ent ilation ▁and ▁escape ▁sh aft s ) ▁– ▁T unnel ▁emer gency ▁ex its ▁are ▁located ▁every ▁ 1   km ▁along ▁express way ▁t unn els , ▁such ▁as ▁S MA RT ▁T unnel , ▁Pen ch ala ▁T unnel ▁on ▁S print ▁Express way , ▁Men ora ▁T unnel ▁on ▁North – S outh ▁Express way ▁and ▁Gent ing ▁S emp ah ▁T unnel ▁on ▁K ual a ▁L ump ur – Kar ak ▁Express way . ▁ ▁Highway ▁hot line ▁service ▁– ▁Every ▁express way ▁has ▁a ▁hot line ▁service . ▁ ▁Highway ▁pat rol ▁unit ▁– ▁Every ▁express way ▁has ▁a ▁highway ▁pat rol ▁unit . ▁