Negotiation means reaching a mutual consensus with the aim of resolving the disputes with acceptable solutions for all the parties. Negotiation is common in day-to-day affairs, but is of more significance in the areas, like contracts, business deals and domestic problems. The literature shows that negotiation is a communication process and provides a medium for the opposite sides to sit across the table and resolve the disputes and conflicts. Contrary to this, the available literature emphasis more on the decision-making aspect of the negotiation, but lacks discussion on the communication processes, which can in fact make or break a deal, project, or a contract. To address this issue, the aim of this study was to investigate the communication processes in an actual negotiation scenario. For this purpose, the communication processes in Bus Rapid Transit (BRT) were studied and 30 interviews were conducted from the project team and the affected persons. Data was analyzed using applications of constructivist grounded theory which leads to the formation of Communication as a major theme of study. The results exhibit that communication serves as a medium for exchange of information and has an integral part in negotiation processes. Meetings, interactions, discussions, and networking emerged as major themes of communication in this study, and it mediates the negotiation process and leads to the resolution of disputes. Therefore, effective communication plays a significant role in negotiation, reaching agreements and resolving disputes. This research studied negotiation and communication in BRT project only. Further studies could analyze the negotiation processes in other projects and scenarios to further elaborate mediation of communication in negotiations.