What are the special features of semi-trailer trucks with short coupling systems?

The selection of all three statements regarding semi-trailer trucks with short coupling systems is correct.

1. The cornering characteristics of these units are indeed different from conventional articulated trucks. Short coupling systems allow for tighter turning radii, which can affect maneuverability, especially in urban settings.

2. The coupling device in these trucks is subject to a higher level of wear due to the unique stress and strain placed upon it from the different dynamics of operation compared to standard articulated trucks.

3. The useful loading area is larger with short coupling systems, allowing for more efficient use of space compared to conventional systems that may restrict the available area for cargo.

Understanding these differences is crucial for safe operation and compliance with German traffic regulations, which require drivers to be aware of the vehicle's handling characteristics and maintenance needs. This knowledge can help prevent accidents and ensure safer driving conditions.