In recent years, numerous major traffic accidents involving highway passenger buses have resulted in significant casualties. The primary causes include driver fatigue, excessive driving hours, and speeding. These buses’ driving hours and vehicle speeds are recorded using mechanical and digital tachographs. However, these methods fail to provide real-time, precise calculations of driving hours, monitor driving behavior, and ensure the accuracy, safety, and sharing of tachograph data. Therefore, this paper introduces an innovative approach based on Intelligent Transportation Systems (ITS) principles. We propose vehicle OBD or J1939 standards to capture various physical data from the vehicle. By integrating Internet of Vehicles (IoV) and blockchain (consortium chain) technologies, we store driving data on the blockchain to guarantee its accuracy and safety. Additionally, blockchain enables precise analysis of driving hours and monitoring of real-time driving behavior. Finally, utilizing blockchain and the Proof of Authority (PoA) consensus mechanism, we develop an IoV-based driving hours management service for highway passenger buses. This system effectively shares and manages driving hours and behaviors, enhancing road safety for highway passenger buses. It achieves the ITS data accuracy, confidentiality, sharing, and overall road safety goals.