Why is a warning triangle necessary on the Autostrada?

A warning triangle is necessary on the Autostrada primarily to attract attention in emergencies. When a vehicle breaks down or is in distress, placing a warning triangle at an adequate distance behind the vehicle serves as a clear signal to other drivers. This alerts them to the potential hazard and encourages them to proceed with caution, thereby enhancing safety on the busy roadway.

In high-speed environments like the Autostrada, quick recognition of a potential obstruction or danger is critical for preventing accidents. The reflective properties of the triangle make it visible even in low light conditions, further ensuring that drivers have ample warning to adjust their speed and maneuver safely around the situation.

The other options do not align with the primary purpose of the warning triangle; a construction zone requires signage from road authorities, the presence of wildlife is typically indicated by specific wildlife crossing signs rather than a triangle, and preventing car theft involves security measures unrelated to roadside signaling.