If I am lost in the woods, and I find a trail or a road, how do I decide which way to go?

Autumn Veatch was 16 years old in 2015, when her grandparents small plane crashed in the North Cascade Mountains. It was two days of hiking before she found a trail.

Just ahead, spanning the small river is a mystical-looking bridge made of logs. To either side of it, heading in opposite directions, is a well defined, trampled down trail. Getting Out Alive: The Autumn Veatch Story

Finding a trail or a road, is only the next step in a journey to survive, how do you decide which way to go?