Abstract
One of the stumbling blocks for implementation of Vehicular Ad Hoc Networks is the penetration rate: the percentage of vehicles that have the communication equipment installed. As the equipment deployment is unlikely to happen instantaneously, it is important to explore the performance gains achievable at low penetration rates. This especially pertains to safety applications, which are expected to provide life-saving information to all drivers on the road within a given region. We propose a technique that can be employed by safety applications to address the low penetration issue. By using visual cues on the equipped vehicles, such as specific patterns of hazard warning lights, we show that for all but the lowest vehicle densities, a radio penetration rate of 30% is sufficient to inform more than 95% of drivers in the region of interest in a timely manner.
Highlights
Vehicular Ad Hoc NETworks (VANETs) are designed with the primary goal of decreasing the number of road accidents
For both lead-vehicle stationary (LVS) and lead-vehicle moving (LVM), in normal visibility and at 20% radio penetration rate, 90% of the drivers were informed in low vehicle density scenarios
We proposed a new technique for efficiently delivering safety-related information using both the visual and the radio communication channel in VANETs
Summary
Vehicular Ad Hoc NETworks (VANETs) are designed with the primary goal of decreasing the number of road accidents. During the deployment phase, the penetration rate will be below 100%, which is often deemed as necessary for successful implementation of safety applications, such as those discussed in [3] To help overcome this issue, we propose to combine standard wireless communication with a visual cue technique that helps inform the drivers of the unequipped vehicles about hazardous situations. The first collaborative safety application on highways resulted from manually switching on the hazard warning lights to inform other drivers about a dangerous situation ahead, such as slow or halted vehicle, an accident, or adverse weather conditions Inspired by this visual cue technique, we propose to leverage radio communication to exchange information about the hazardous situation among the radio-equipped vehicles, at the same time automatically activating visual cues. In informing a larger number of drivers about a hazardous situation
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