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Freeway service patrols (Dsfpcg)

Communication and control (D)
    Communication (Ds)
         Related Term (Associative): 
        Communication systems by recipient (Dsf)
            Traveler information and communication systems (Dsfp)
                 Use For: Passenger information
                 Related Term (Associative): ; Kiosks (Pfbk); Information systems (Xbf); Crowdsourcing (Xbkcc)
                Motorist aid systems (Dsfpc)
                     Use For: Driver aid systems; Driver assistance systems (Motorist aid)
                    Automatic crash notification (Dsfpcb)
                         Use For: Automated accident detection; Automated collision notification
                         Related Term (Associative): Emergency communication systems (Hhgec); Event data recorders (Qpye)
                    Emergency road service (Dsfpce)
                    Freeway service patrols (Dsfpcg)