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Upon the spreading of intelligent transportation technology, reconfigurable intelligent surface (RIS) can be applied in traditional vehicular networks to assist autonomous driving, so as to deal with blind spots and high energy consumption of long-distance communication in vehicles communication system. However, achieving bidirectional reliable communication for vehicular networks is challenging because of the high mobility of vehicles. The existing solution relies on constantly reconstructing end-to-end communication links for bidirectional communication in vehicular networks. Moreover, waiting timers on the data transmission path can double the transmission delay for data return, not to mention the potential communication delays and overheads triggered by the rapid movement of the vehicle. In order to avoid those tricky situations, this article proposes a novel two-way reliable forwarding strategy (TRFS) for …