Final answer:
In Texas, the law requires that a driver must signal at least 100 feet before making a turn.
Step-by-step explanation:
Under Texas law, when you intend to turn, you must signal continuously for at least 100 feet before you turn. This regulation is in place to ensure that other drivers on the road have enough time to react to your intended turn, helping to maintain safety on the roads. If driving conditions are such that this would not be possible, the signal must be given as soon as possible before the turn.