The accident took place along the outer loop of the beltway past Harford Road in Parkville.
The trooper was investigating a collision when a blue Honda hit his police cruiser.
The impact from the collision sent the vehicle into a concrete barrier.
The trooper managed to avoid injury in the incident.
The Honda driver was treated for non-life threatening injuries.
The accident shut down all lanes of traffic along the beltway for about an hour.