▁Highway ▁hel ic opter ▁pat rol ▁unit ▁– ▁This ▁unit ▁is ▁available ▁at ▁all ▁PL US ▁Express way ▁networks ▁only . ▁ ▁Tra ffic ▁Control ▁and ▁Sur ve ill ance ▁System ▁( TC SS ) ▁– ▁The ▁Tra ffic ▁Control ▁and ▁Sur ve ill ance ▁System ▁( TC SS ) ▁compr ises ▁a ▁number ▁of ▁traffic ▁monitoring ▁systems ▁such ▁as ▁Tra ffic ▁Cl osed - Circ uit ▁Television ▁( C CT V ), ▁Tra ffic ▁Mon itor ing ▁Centre ▁( T MC ), ▁Variable ▁Message ▁Systems ▁( V MS ) ▁and ▁Ve h icles ▁Break down ▁S ens ors . ▁ ▁Integr ated ▁Transport ▁Information ▁System ▁( IT IS ) ▁– ▁This ▁system ▁is ▁normally ▁found ▁in ▁the ▁K lang ▁Valley , ▁Pen ang ▁and ▁I sk and ar ▁Malays ia / J oh or ▁Bah ru . ▁ ▁Road ▁Transport ▁Department ▁( J P J ) ▁En for cement ▁St ations ▁– ▁These ▁stations ▁can ▁be ▁found ▁at ▁Kar ak ▁Express way ▁and ▁East ▁Coast ▁Express way . ▁These ▁J P J ▁enfor cement ▁stations ▁have ▁we igh ing ▁brid ges ▁to ▁detect ▁heavy ▁vehicles . ▁ ▁Police ▁Watch ▁Tower ▁– ▁These ▁to wers ▁can ▁be ▁found ▁at ▁all ▁inter state ▁express ways ▁in ▁Malays ia ▁to ▁monitor ▁traffic ▁situations ▁during ▁fest ive ▁seasons . ▁ ▁Warning ▁lights ▁– ▁These ▁yellow ▁lights ▁can ▁be ▁found ▁in ▁ha z ard ous ▁and ▁accident ▁areas . ▁ ▁Autom ated ▁En for cement ▁System ▁( A ES ) ▁– ▁These ▁systems ▁can ▁be ▁found ▁at