Algorithm 2 The proposed push-based critical data forwarding algorithm at a consumer.

Received Data Packet: (ID, Content, Alert Type, Location, Timer, Signature) 2:if Alert Type == $b_i$ (critical data packet) then       read b 4:      if Vehicle ($v_i$)== CH (Cluster Head)then             Broadcast $bi$ 6:            if Vehicle ($v_i$)== $G{W}_i$ then                   Forward b to $G{W}_{i+1}$ 8:            else                   drop b 10:           end if       end if 12: end if