02203nas a2200193   4500008004100000245004600041210004600087260002400133300001000157520163100167100002201798700002101820700001701841700001701858700001701875700002301892700001601915856007801931       2016                        eng d00aPower Efficient Vehicular Ad Hoc Networks0 aPower Efficient Vehicular Ad Hoc Networks  aReston, VAc03/2016  a26-313 aInter-vehicular communication is a growing plat- form for improving roadway safety. The highly mobile nature of Vehicle to Vehicle communications causes rapid changes in network topologies and propagation conditions. Since the advent of Vehicular Ad-Hoc Networks (VANETs), over fifty routing protocols with attendant topologies have been proposed. Despite these protocols’ merits, many of them are not optimized for power management and frequency reuse. Our approach utilizes the one dimensional dynamic of divided highways to simplify the routing problem and reduce energy consumption. Since each car is aware of only two types of connections, up-road and down-road, we can form low power, line of sight links between adjacent vehicles. We also utilize a fuzzy logic algorithm that predicts the location of up-road cars to reduce interference from request for link signals. Once these links have been established, up-road vehicles send data down-road for a length of time based on the relative speed of the two vehicles. After this time period has expired the down-road vehicle must request additional information, restarting the timer. Data sent through the network will include information on up-road vehicles, and when required, messages such as accident notifications, alerts, and traffic warnings. Through simulation, we show that our approach to VANETs maintains its update frequency despite bumper to bumper traffic and uses two to five orders of magnitude less power than an IEEE 802.11 network with clustering and 1 mW transmit power. Overall, the network performs well and is a viable improvement to the standard.1 aHolcomb, Sterling1 aKnowlton, Audrey1 aGuerra, Juan1 aAsadi, Hamed1 aVolos, Haris1 aSprinkle, Jonathan1 aBose, Tamal  uhttps://csl.arizona.edu/content/power-efficient-vehicular-ad-hoc-networks