Simplify the following text for a Grade 9 native English-speaking person.
Original: To save the fleet of trams from the intensive bombing of Southampton during World War II , they were painted gray , regular services ceased at 7pm and they were parked up overnight in Cemetery Road on Southampton Common .
Simplified: To save the fleet of trams from the intensive bombing of Southampton during World War II they were painted gray . Regular services stopped at 7pm and they were parked up overnight in Cemetery Road on Southampton Common for the same reason .