What is the maximum permissible length of a combination of a truck and one trailer if a load does not project backward?

In Germany, the maximum allowable length for a combination of a truck and one trailer without any load projecting beyond the rear is 18.75 meters. This regulation ensures safe maneuverability and adequate space on roads and in traffic. If the load protrudes backward, different rules apply, but for standard use without overhanging loads, 18.75 meters is the legal limit. This is why answer 1 is correct. Remembering this length helps when dealing with vehicle combinations in driving theory and practical situations.