From an overhead view, the sight is somewhat jarring. The Pennsylvania Turnpike essentially cuts Oakmont's golf course in half.

U.S. Open at Oakmont is testing the world's best golfers like few tournaments do. Here's how the cut line works at golf's toughest major.

The 125th U.S. Open is taking place this week outside of Pittsburgh at Oakmont Country Club, and after a dry, hot start, shower and storm chances will increase for the weekend. Oakmont Country Club is hosting the tournament for a record 10th time this year, with the last one in 2016 when Dustin Johnson won.

For a six-lane interstate carving its way through a world-famous golf course, the Pennsylvania Turnpike at Oakmont is surprisingly unintrusive. From an overhead view, the sight is somewhat jarring, a wide expressway and railroad track dividing the course essentially in half.

All three were between seven and eight shots behind the leader, and all were in danger of being cut Friday. The U.S. Open remains golf’s cruelest test.

The U.S. Open is a difficult test, but capturing this edition is downright impossible if you don't have good fortune.

The U.S. Open is often one of the toughest tests in golf, and Oakmont Country Club is one of its tracks that is living up to its expectations.

There's no such thing as a quick 18 holes at the U.S. Open, particularly when it's at Oakmont. Players needed more than 5 1/2 hours or more to get through each of the opening two rounds, much slower than what they might find at a regular tour stop.