Where does this happen? I had a weekly commute across southern Michigan on US 12. Every eight to ten miles, there was another town, and the road widened from two to four lanes, allowing easy passing of anyone I'd been "stuck" behind. I always calculated my time savings (miles to the next town, desired speed, current speed) from a pass before I even checked for oncoming traffic. It did wonders for my blood pressure. I saw way too many people trying over and over, and occasionally making a really risky choice, to pass someone who was doing 53 in a 55 when there were only a couple of miles to the next town. So I'm making this suggestion only that one think before acting. If you can pass safely, by all means, do so. I'm not going to hold you up.
Also, reflecting my status as a former math teacher, I adjusted the numbers to reflect freeway driving and to get a "nice" answer; I read once that the average freeway commute was about eight miles.