The proposal entitled as “Wireless Vehicular Communication” deals with communication between vehicles and infrastructural units. This proposal is designed to enable communication between vehicles and the surrounding infrastructure, such as traffic signals and road sensors. The aim of this project is to improve traffic flow, reduce congestion and enhance overall road safety. This project primarily aims at providing instantaneous communication between two vehicles or between vehicles and infrastructure to ensure safety of the passenger. This system is also known as Crucial Message Exchange System (CMES). CMES not only helps in message transmission but also in collection, storage and monitoring of the messages. This system processes data and has the ability to extract crucial information for future machine language-based processing. The CMES system uses the ESP8266 module as the on-board unit in a vehicle to implement Vehicle to Infrastructure Communication (V2I). This module interacts with the Raspberry Pi board using Message Queue Telemetry Transport (MQTT) protocol to relay information. The Raspberry Pi board is considered as the embedded unit in the infrastructure. Raspberry Pi not only facilitates the collection of data but also is responsible for storage and retrieval in cloud systems. All the said components working together ensures a reliable message passing system which will be of immense help to the drivers/passengers on road.