Original sentence: The Transrapid train hit the maintenance vehicle at approximately 200 km/h (125 mph), resulting in the partial derailment of the Transrapid and severe damage to both vehicles.There was a maintenance vehicle on the tracks to check them for debris
Edited sentence: A (wheeled) maintenance vehicle was moving on the tracks to check them for debris, and the Transrapid train hit the maintenance vehicle at approximately 200 km/h (125 mph), resulting in the partial derailment of the Transrapid and severe damage to both vehicles