Under Tennessee law, if you intend to turn, you must start to signal _________ before you turn.

Explanation

Whenever you intend to turn, communicate your intention well in advance. Under Tennessee law, if you intend to turn, you must start to signal at least 50 feet before you turn. (Note: At the speeds of which today's vehicles and roads are capable, 50 feet may not be enough. At 40 mph, a vehicle will travel 50 feet in just under one second, which is not much advance warning for that driver. At higher speeds, you should start to signal sooner.)