No, you should treat people like adults, set a deadline, and let them execute to that deadline. Many people balance multiple tasks, objectives, and goals and so

No, you should treat people like adults, set a deadline, and let them execute to that deadline. Many people balance multiple tasks, objectives, and goals and so taking 10 hours for a task that was assigned 10 hours is perfectly reasonable. If you keep planning 10 hour car rides and they continuously come in at 5 hours, you're bad at estimating.