Final answer:
The red outlined orange triangle symbol is used for slow-moving vehicles, which ensures other drivers are aware and cautious, contributing to overall road safety.
Step-by-step explanation:
Traffic signs or road signs are signs erected at the side of or above roads to give instructions or provide information to road users. The earliest signs were simple wooden or stone milestones. Later, signs with directional arms were introduced, for example the finger posts in the United Kingdom and their wooden counterparts in Saxony.
The red outlined orange triangle symbol is used for B: Slow-moving vehicles. This symbol alerts other drivers to the presence of a vehicle that travels at slower speeds than typical traffic, such as agricultural machinery or construction equipment. Using this symbol enhances pedestrian safety and road safety in general, as it warns drivers to adjust their speed and be cautious when approaching.
Traffic signals contribute to road safety by controlling traffic flow, ensuring vehicles slow down and pedestrians cross intersections safely, especially in areas with high traffic density and frequent accidents.