@article{ref1,
title="Impact of safety message generation rules on the awareness of vulnerable road users",
journal="Sensors (Basel)",
year="2021",
author="Lara, Tomás and Yáñez, Alexis and Céspedes, Sandra and Hafid, Abdelhakim Senhaji",
volume="21",
number="10",
pages="-",
abstract="In the face of cooperative intelligent transportation systems (C-ITS) advancements, the inclusion of vulnerable road users (VRU), i.e., pedestrians, cyclists, and motorcyclists, has just recently become a part of the discussion. Including VRU in C-ITS presents new challenges, most notably the trade-off between the increase in VRU safety and the aggravation in channel congestion resulting from VRU-generated messages. However, previous studies mainly focus on network-related metrics without giving much consideration to VRU safety-related metrics. In this context, we evaluated such a trade-off with a study of motion-based message generation rules for VRU transmissions. The rules were analyzed using theoretical and simulation-based evaluations. In addition to studying the message generation rules using channel load metrics, such as channel busy ratio (CBR) and packet delivery ratio (PDR), we introduced a new metric: the VRU Awareness Probability (VAP). VAP uses the exchange of messages from active VRU to measure the probability of VRU detection by nearby vehicles. <br><br>RESULTS show that fixed message-filtering mechanisms reduce the overall channel load, but they could negatively impact VRU detection. We established the importance of quantifying the VRU awareness and its inclusion in C-ITS analysis because of its direct impact on VRU safety. We also discussed approaches that include VRU context and dynamism to improve the definition of message generation rules.<p /> <p>Language: en</p>",
language="en",
issn="1424-8220",
doi="10.3390/s21103375",
url="http://dx.doi.org/10.3390/s21103375"
}