ABSTRACT
Vehicular adhoc network (VANET) is the adhoc network that provides intelligent transportation services. Transportation plays a crucial role in smart city development. There are several aspects of VANET that have not been studied, and hence it is an area that provides much scope for research. In VANET, nodes communicate with each other to share either safety or non-safety information. Safety information may contain various kinds of messages like 170traffic jam condition, accidents met by vehicles, bad weather, road conditions, collision of vehicles because of sudden break applied by the next vehicle, and so on. Non-safety information may include messages like driver details, documents, songs, movies, and so on. In the event of a fire accident in the city, an automatic call gets placed to the fire station due to alarm systems or because of someone manually calling for a fire brigade. As the fire brigade has to reach the accident location as soon as possible, it is considered as an emergency event. This emergency event message is forwarded to all vehicles in the range of the fire brigade, so that they can give it way, creating an easy and fast passage for the fire brigade. If the road to the place of the fire accident is packed due to traffic, then the intermediate vehicles can suggest an alternate path to reach that place. The driver can also make a request for an alternate path to the server, which, on being provided, can be used by the driver to select the best path and proceed to the accident location. It is very important for a fire vehicle to reach the location of fire on time to avoid fatalities and property losses. Figure 9.1 shows a VANET scenario and the types of communication associated with the scenario [1][2]. Vehicular network scenarios. https://s3-euw1-ap-pe-df-pch-content-public-u.s3.eu-west-1.amazonaws.com/9780429440953/5c64355f-70ef-4794-bc41-3e9ebc4e3a6c/content/fig9_1_PB.tif"/> https://s3-euw1-ap-pe-df-pch-content-public-u.s3.eu-west-1.amazonaws.com/9780429440953/5c64355f-70ef-4794-bc41-3e9ebc4e3a6c/content/fig9_1_OC.tif"/>
