Final answer:
The general meaning of a traffic sign can be first identified by its color and shape. However, the messages written on the sign also play a significant role in understanding its meaning.
Step-by-step explanation:
The general meaning of a traffic sign can be first identified by its color and shape. Traffic signs use specific colors and shapes to convey different meanings. For example, a red octagon signifies a stop sign, while a yellow diamond shape typically indicates a warning sign. However, it's important to note that the messages written on the sign also play a significant role in understanding its meaning.