Where are you allowed to park motor vehicles with a permissible total mass exceeding 7.5 t in built-up areas regularly on sundays and public holidays and between 10 p.m. and 6 a.m.?

Your answer is correct. According to German traffic rules, motor vehicles with a permissible total mass exceeding 7.5 tons are only allowed to park regularly on Sundays, public holidays, and between 10 p.m. and 6 a.m. in specific areas to minimize disturbance and protect sensitive zones. These areas include health resorts and hospital zones, where rest and quiet are essential, as well as industrial areas, where heavy vehicle presence is more acceptable and does not disrupt residential peace. Parking in wholly residential areas outside these times or without special designation is generally prohibited for such heavy vehicles to avoid noise and safety issues. Understanding these restrictions helps to ensure that heavy goods vehicles do not negatively impact community well-being during sensitive times.