In recent years, inter vehicular networking technologies are gaining momentum due to its merger with wireless internet through infrastructure gateways. A large quantity of internet data traffic heavily relies on transmission control protocol (TCP) due to reliable connection oriented services. TCP with sluggish window growth and weakly shaped congestion control mechanism fails under multi-hop inter vehicular conditions due to disjoint links and wireless channel errors. This paper introduces inter vehicular access network (IVAN) TCP, designed to suppress the limitations of congestion control and window increment algorithm in the multi-hop inter vehicular wireless environment. The IVAN’s flexible window increment algorithm newer growth pattern achieves a faster increase in the transmission rate. Furthermore, IVAN’s congestion control algorithm reduces the transmission rate based on sender’s window utility and relay router’s explicit congestion notification. The simulation results confirm the significant rise in IVAN’s throughput performance, substantial reduction in the queue packet drop and packet latency against standard TCP variants under inter vehicular environment.