In omnidirectional/directional MMW radar multi-data fusion for road network operation monitoring technology, as the vehicle will be obscured while in motion. It causes the MMW radar sensor to fail to scan and detect the corresponding vehicle for a short or long period of time. This phenomenon can make the system unable to continuously track and locate a particular vehicle. Therefore, the paper investigates the compensation method for vehicle monitoring when obstacles and vehicles are obscured based on omnidirectional/directional MMW radars multi-data fusion, and proposes for the first time an omnidirectional/directional MMW radar vehicle breakpoint inertia compensation technique to pre-determine the trajectory, driving status and position of the lost vehicle. This ensures that in the event of a temporary loss of this target information, the data remains coherent and unchanged. The technical difficulties of obstruction and vehicle obscuration on highways are solved.