Recently, the IntelliDrive initiative has been proposed by the US Department of Transportation (USDOT) to enhance on-road\r\nsafety and efficiency. In this study, we provide a mathematical framework which predicts the effect of such technologies on the\r\nefficiency of multilane highway systems prior to their real-life deployment. Our study shall encompass mixed traffic conditions in\r\nwhich a variety of assisted, automated and unequipped vehicles coexist. We show that intervehicular communications improves\r\nthe flow of vehicles by reducing the perception-reaction (P-R) times of drivers and, in some cases, allowing for more efficient\r\nlane-changing operations. As we shall see, unlike the latter, the former effect of IntelliDrive on driver P-R time is always there,\r\nregardless of the specific traffic conditions.
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