For what are you allowed to use the loudspeaker system when driving in regular traffic?

You answered correctly. In regular traffic, you are only allowed to use the loudspeaker system to transmit traffic information from the radio and to give operational information. The reason for this rule is to ensure that the loudspeaker is not used for entertainment or unnecessary announcements, which could distract you or other road users. Using the system only for important or safety-related purposes helps maintain concentration and road safety. Entertainment of passengers through the loudspeaker is not permitted while driving. Remember this distinction for future questions: only use the loudspeaker for traffic or operational announcements, not for entertainment.