Vehicular Ad Hoc Networks (VANETs) support the information dissemination among vehicles, Roadside Units (RSUs), and a Trust Authority (TA). A trust model evaluates an entity or data or both to determine truthfulness. A security model confirms authentication, integrity, availability, non repudiation issues. With these aspects in mind, many models have been proposed in literature. Furthermore, many information dissemination approaches are proposed. However, the lack of a model that can manage traffic incidents completely inspires this work. This paper details how and when a message needs to be generated and relayed so that the incidents can be reported and managed in a timely manner. This paper addresses this challenge by providing a traffic incident management model to manage several traffic incidents efficiently. Additionally, we simulate this model using the VEINS simulator with vehicles, RSUs, and a TA. From the experiments, we measure the average number of transmissions required for reporting a single traffic incident while varying the vehicle density and relaying considerations. We consider two types of relaying. In one series of experiments, messages from regular vehicles and RSUs are relayed up to four hops. In another series of experiments, messages from the regular vehicles and RSUs are relayed until their generation time reaches sixty seconds. Additionally, messages from the official vehicles are relayed when they approach an incident or when the incident is cleared. Results from the simulations show that more vehicles are informed with four-hop relaying than sixty-second relaying in both cases.

翻译：车载自组织网络（VANETs）支持车辆、路边单元（RSUs）与可信机构（TA）之间的信息传播。信任模型通过对实体、数据或两者进行评估以判定其可信度。安全模型则用于确认认证、完整性、可用性与不可否认性问题。基于这些方面，已有许多模型在文献中被提出。此外，众多信息传播方法也相继问世。然而，现有研究缺乏能够完整管理交通事件的模型，这启发了本项工作。本文详细阐述了消息应在何时以及如何生成与转发，以便及时报告并处理交通事件。为此，本文提出一种交通事件管理模型，以高效应对多种交通事件。我们进一步使用VEINS仿真器，模拟包含车辆、RSUs和TA的场景进行验证。实验中，我们通过改变车辆密度与转发策略，测量了报告单个交通事件所需的平均传输次数。我们考虑了两种转发机制：在一组实验中，来自普通车辆与RSUs的消息最多转发四跳；在另一组实验中，此类消息的转发持续至其生成时间达到六十秒。此外，来自官方车辆的消息仅在接近事件或事件解除时进行转发。仿真结果表明，在两种情况下，四跳转发机制能使更多车辆获知事件信息，其效果优于六十秒限时转发。