Any load which projects from the rear of the vehicle by 1.5m (5 ft.) or more must be marked with:

A. A yellow flag or marker in daylight, a blue light at night.
B. A red flag or marker in daylight, an amber light at night.
C. A red flag or marker in daylight, a red light at night.
D. A blue flag or marker in daylight, a yellow light at night.

The correct way to mark a load projecting from the rear of a vehicle by 1.5m (5 ft.) or more is with a red flag or marker in daylight and a red light at night.

Explanation:

The answer to the question regarding how a load projecting from the rear of a vehicle must be marked is C. A red flag or marker in daylight, a red light at night. It is important for safety on the roads that any projecting load is clearly visible to other road users. During the day, a bright red marker provides high visibility, while at night a red light is commonly used internationally as a signal for the rear of a vehicle or load, alerting drivers to the presence of the vehicle ahead of them. Ensuring that tip trucks have the necessary warning lights and sound signals like beepers is crucial for the safety of workers and everyone around the work site, especially when the load bed is lifted.