These days, road safety applications have become significant due to the assurance of Quality of Service (QoS) requirements such as scalability, latency, and security facilitates multi-hop wireless broadcast capabilities in VANETs. Factors such as limited bandwidth, minimum contention window size and mobility of vehicular nodes make multi-hop broadcast a challenging endeavor. This paper proposes a suitable data diffusion model with emergency message transfer and clustering of neighborhood nodes based on zones. Based on the location of emergency-message senders, zones such as Red Orange and Yellow (ROY) are created to partition the vehicle in terms of directional, bi-directional and multi-directional broadcast in diverse directions. The adjustments in urgency factor on the basis of the emergency seamlessly handle the traffic target areas. The analysis and simulation result shows that the proposed diffusion model improves the performance aspects such as delay, message overhead and reception rate compared to the existing models. © 2019 Intelligent Network and Systems Society.