Final answer:
A driver with their left arm extended and bent upward is signaling their intention to turn right. It's an important hand signal for road safety and communication among drivers.
Step-by-step explanation:
This driver has extended his left arm, bent and pointing straight up. This driver intends to signal an intention to turn right.
In standard road traffic hand signals, the left arm extended upwards is the universal gesture for a right turn, contrasting with the left arm extended straight out for a left turn.
Such signals are important for road safety and effective communication among drivers, ensuring that other motorists are aware of the intended actions so they can react accordingly.
While turn signals on modern vehicles have largely replaced the need for these hand signals, they are nonetheless important to understand, especially in situations where a vehicle's signal lights may be malfunctioning or when cycling.