Cooperative intelligent transport systems and services (C-ITS) are based on periodical data sharing between cooperative V2X communication units (in-vehicle and roadside units, ITS stations) via a short-range ad-hoc network. All participants are able to acquire information several times per second from others such as position, speed and driving direction as well as intentions and event triggered messages like incidents and emergency braking. Roadside infrastructure can share traffic information like road works or speed limits.
As such, C-ITS improves road safety and effectiveness of the transportation system while reduces harmful environmental effects. Transportation authorities and road network operators use cost-benefit analysis to decide on necessary developments. Taking into account only the momentary statistical renewal rate of the vehicle fleet (disregarding all handheld devices), a fully capable operation of such a system can only be predicted in more than 10 years.
An overview of existing C-ITS use cases throughout Europe and a simplified comparative analysis of estimated costs and quantifiable benefits of such a system in Hungary is presented in this article. Our research assigned the first developments (i.e. technologies and use cases) in the next 1-3 year period to prepare certain parts of the public road network for CAV testing.

C-ITS, impact assessment, use cases