What must you show passengers if requested in regular traffic?

In the context of German traffic regulations, when passengers request information, drivers must provide relevant documentation regarding transportation services. The selected combination of options—transport rates and transport conditions, along with the timetable—ensures that passengers have access to crucial information about pricing and schedules.

According to German transportation law, carriers are obligated to be transparent about service terms and provide up-to-date information. This enables passengers to make informed decisions about their travel plans. The third option, a city map with road register, is not typically required for regular traffic situations, which is why it's not part of the correct answer. Understanding this helps reinforce the importance of clear communication and adherence to regulations in public transport.