Final answer:
The statement is true; slow-moving vehicles must have an orange triangle displayed on their rear to alert other drivers of their lower speeds.
Step-by-step explanation:
The statement that slow moving vehicles must have an orange triangle displayed on the rear is true. This orange triangle is known as a slow-moving vehicle emblem and is designed to alert other drivers that the vehicle is traveling at speeds slower than normal traffic. This emblem is commonly seen on agricultural machinery, construction equipment, and any vehicles that cannot reach speeds greater than 25 miles per hour. It is crucial for safety on the roads, especially in areas where high-speed traffic can come upon slow-moving vehicles unexpectedly.