Abstract The purpose of this study is to create a system that can inform the bus position and provide information about the arrival time of the bus. We propose real time monitoring of the position and estimated time of arrival of Damri buses using the Haversine formula. GPS devices that are applied to each bus are monitored by utilizing passengers’ cellular applications. The results show information about the position of the bus and estimated time of arrival of the bus at each stop. This research can help estimate the arrival time, especially in providing information about the certainty of bus arrival to prospective passengers who are waiting at each stop according to the bus destination.