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The need for safety in transportation systems has increased the popularityand applicability of Vehicular Ad-Hoc Networks (VANETs) in recent years.On-time reception and processing of alarms caused by possible accidents as wellas the preventive actions have important roles in reducing human and financiallosses in road accidents. In such cases, the performance of safety applicationsshould be evaluated and guaranteed to show whether or not they can ensure thesafety of humans and cars. In this paper, we analyze the behavior of VehicularAd-Hoc Networks by checking the real-time properties of the IEEE 802.11pprotocol using a Colored Petri Net model. To analyze the performance of relatedstandards, simulations are conducted using CPNTools. Standards from EuropeanTelecommunications Standards Institute (ETSI), and Vehicle SafetyCommunications (VSC) are evaluated in this research. We will show that suchstandards may not completely fulfill the safety requirements in particularsituations.

Analysis and Evaluation of Real-time and Safety Characteristics of IEEE 802.11p protocol in VANET