This standard specifies the terms and definitions, data communication protocols, interaction modes, and data exchange standards between roadside units in cooperative intelligent transportation systems and roadside systems such as traffic signal control systems, vehicle detection systems, and violation capture systems at road traffic intersections. And the roadside unit provides vehicle speed guidance data service standards for the vehicle-mounted unit.
T/ITS 0040-2015 history
2015T/ITS 0040-2015 Data specification of Speed Guide Service System in Cooperative ITS