In this paper, Vehicular Ad hoc Networks (VANET) has been adopted for analysing connectivity among vehicular nodes in a mobile environment. It is assumed that the nodes travel through a multi lane and unidirectional highway path through multiple entry points without any crossing with each other. The nodes are distributed along the whole area by Poisson Distribution process. These mobile nodes communicate with each other through a specified distance and transmission range. However, since transmission is prone to interference thus a probabilistic approach has been proposed in this paper for better inter-communication between the nodes. Also, it is very essential that the knowledge of highway distribution should be pre-known before travel. This should be done in order to prevent and minimize any kind of collision or other tragic situations. Probability Density Function (PDF) has been used to extensively distribute the nodes based on better and reliable communication links through wireless channels. Since in this paper a multi lane headway path has been considered therefore the distribution of travelling nodes in each considered segment should be such that it prevents any collision or accident and also provide better interconnectivity and reliable link duration. The main contribution of this paper is to enhance the link duration performance between inter-nodal mobile communication while the vehicles move towards their exit points. The simulation results have shown 15% better improvement in keeping long link duration and better Poisson-based nodal distribution. The proposed approach will definitely help in better travel experience and road safety. The extensive simulations performed have successfully validated and confirmed the proposed approach.