Problems related to the single, isolated automotive vehicle and its subsystems are challenging enough (see the grand challenge on Advanced Driver Assistance Systems), but the research community is also exploring the “big picture” of intelligent road transportation – the system, or system of systems, consisting of many vehicles and their drivers interacting on roads. Two related topics are included in this vision: Vehicle-to-infrastructure (V2I) interaction and Vehicle-to-vehicle (GSM GPS Tracker ) interaction. In Vehicle-to-infrastructure (V2I) concept, the infrastructure plays a coordination role by gathering global or local information on traffic and road conditions and then suggesting or imposing certain behaviors on a group of vehicles. One example is ramp metering, already widely used, which requires limited sensors and actuators (measurements of traffic density on a highway and traffic lights on ramps).
Contrarily, nomadic systems are generally introduced inside vehicles by their own drivers and one of the characteristics that distinguish this type of system is the fact that they can be used for besides the driving context. They can be activated in different situations and with different aims because these equipments can include also Phone GPS Tracker functions, access to the internet, and electronic agenda, among several other utilities. Concerning the manmachine interaction in a road environment, nomadic systems are similar to systems fitted as standard to the vehicle as they allow the transmission of audio and written messages that can help drivers guide themselves through the road network. However, the way they are positioned and attached inside the vehicle can be considerably different. Unlike the fitted as standard systems, nomadic devices are placed according to drivers‟ wish. This aspect can foresee two problems: the first is related with the proper positioning of the system and consequently with the efficiency on the acquisition of messages; the second is a safety concern as in case of accident the system can be loose and hurt the driver.
In a more sophisticated scenario, the velocities and accelerations of vehicles and intervehicle distances would be suggested by the infrastructure on the basis of traffic conditions, with the goal of optimizing overall emissions, fuel consumption, and traffic velocities. Suggestions to vehicles could be broadcast to drivers via road displays or directly to vehicles via wireless connections. Looking further ahead, in some cases suggestions could be integrated into the vehicle controls and implemented semi automatically (always taking onto account the restrictions on automatic vehicle driving imposed by the Vienna Convention on Road Traffic). V2I promise revolutionary improvements in transportation – greater energy efficiency, less road construction, reduced collisions, and safety of vehicle occupants as well as pedestrians and bicyclists. Control is a key contributing discipline for both topics. Some experts predict that the first V2I systems may be developed and deployed in the 2015- 2020 time frame. A lot of infrastructure technologies and processes are already known, some already developed, interesting and promising ideas appear and research initiatives have been undertaken. The Rear View Mirror With GPS , charging devices in car parks, filling stations for hydrogen, gas and renewable fuels, logistics and services, information systems for users, traffic management are only some infrastructure needs for new research, development and implementation.
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