Final answer:
It's recommended to keep your turn signal on for at least three to five seconds when changing lanes on the freeway, to allow other drivers to anticipate your move.
Step-by-step explanation:
When changing lanes on the freeway, it is recommended that you keep your turn signal on for a minimum of three to five seconds. This allows other motorists enough time to see your signal and predict your movement, ensuring a safer lane change. It's important for drivers to be predictable, so using turn signals appropriately is a key aspect of road safety. Additionally, check your mirrors and over your shoulder for any vehicles in your blind spot before proceeding to change lanes.