What is the 90 degree rule in golf?

The 90 degree rule in golf refers to a guideline followed by golfers when using a cart on the fairway. The rule stipulates that golfers should keep the cart on the path until they reach a point that is roughly 90 degrees to their ball. At this point, they may drive the cart onto the fairway to reach their ball, but they must return it to the path as soon as they leave the area around their ball. The 90 degree rule is intended to prevent damage to the turf and ensure that golfers are not playing from areas that are too worn or beaten down. Some golf courses may vary their rules regarding cart usage, so golfers should always check for specific cart usage guidelines on each course they play.