There are two types of expressions of phrasal verbs.
The best and easy meaning of comprehensive is understand fully or covered widely.
That's going to depend heavily on where you're coming from. Grand Prairie is a western suburb of Dallas. If you live in Arlington, then it's a quick jaunt of a few miles. But if you're starting out from, let's say, Seattle, then you're looking at a good 2,000 miles, and you have to plan on 3 or 4 days on the road.
