Directional arrows on the pavement must be followed once the driver has entered a lane that is marked with them.

Answer: A — True

Following directional arrows on the pavement is crucial for maintaining the proper flow of traffic and ensuring safety on the roads. Once a driver has entered a lane marked with directional arrows, it is mandatory to adhere to the guidance given by those arrows. This is because the arrows indicate the intended direction of traffic flow, which helps prevent accidents and confusion among drivers. Deviating from the indicated direction could lead to dangerous situations, such as head-on collisions or obstruction of other vehicles. Traffic regulations are designed to optimize road safety and efficiency, and obeying such markings is a fundamental aspect of responsible driving. Thus, the requirement to comply with pavement markings once in a lane marked by directional arrows reinforces the importance of following road signs and signals to ensure a safe driving environment for all road users.