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Abstract
Vehicular ad-hoc networks (VANETs) play an essential role in enhancing transport infrastructure by making vehicles intelligent and proficient to prevent traffic fatalities. Direction-based greedy protocols pick a next route vehicle for transmitting emergency messages (EMs) depending upon the present location of adjacent vehicles towards sink vehicles, by using an optimal unidirectional road traffic approach. Nevertheless, such protocols suffer performance degradation by ignoring the moving directions of vehicles in two-ways road traffic where topological changes happen continuously. Due to the high number of vehicles, it is essential to broadcast EMs to all vehicles to prevent traffic delays and collisions. A cluster-based EM transmitting technique is proposed in this paper. For metropolitan VANETs, this paper pioneers the clustering of two-ways road traffic for robust and efficient routing of EMs.
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