You'll see that a bunch where the outbound course from one VOR does not line up with the inbound course to the next. Not sure if it's still in use but there used to be an airway coming up from Florida where the outbound radial would have you fly an even altitude and the inbound radial would require an odd altitude. There was a NOTAM for that airway saying fly north at even altitudes and south at odd altitudes.
Remember the service volume for most VORs down low is only 40 miles. I'd guess most Victor are less than 100 miles from VOR to VOR. The airway is the greater of 4 miles either side of the centerline or that airspace inside lines diverging 4.5 degrees either side of the centerline. The point where where the 4.5 degrees exceeds 4 miles occurs at 51 miles from the station. One degree of error will give you one mile of offset at 60 mile downrange so if you're 4 degrees off you're still on the airway. I'm not sure if that's where the plus or minus 4 degrees for the VOR check comes from.
Granted if you're trying to get to Uncle Bob's International Cow Pasture Airport on the ABC 090 at 90 miles, you might have to make a few wide circles to find it.