Efficiency and safety of transportation systems can be enhanced by informing vehicles aboutcurrent traffic and road condition. Expanding region of propagation in the network established amongvehicles enables informing more vehicles on the road. However, it increases communication cost andimposes delay on the network which is undesirable for propagation of safety information. In this research“communication cost” is defined as least number of vehicles involved in broadcasting data further, and“additional travel cost” is defined as cost differences associated with the paths calculated before and afterinformation propagation. This research investigates how communication cost and additional travel costchange while the region of propagation is extended. The results indicate that extending the region ofpropagation increases the communication cost and decreases the additional travel cost. Also, it issuggested that there needs to be an optimal region for data propagation so that disseminating dataeffectively reduces the additional travel cost.
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