[jandrewrogers]

Everyone I know that has discovered this bug, discovered it in Montana. All of the States that have ubiquitous 80 mph speed limits are clustered around that area.

It reportedly happens with 80 kph speed limit signs in Canada as well.

[dreamcompiler]

Texas has an 80 mph limit on a long stretch of I-10. They have one other highway (130) with an 85 mph limit.