Autonomous Driving (AV) is expected to reduce the traffic accidents. Highways again need to be changed to afford AV, so the benefits we expect from introducing AV can be much larger. Highways which are easy to drive for humans is also easy to AV. Building or changing the highways in the way that they are good at explaining the way how to drive can be the very first step to afford AV. Highways which have the fail-safe features can be the second step to afford AV regardless of the weather is good or bad. Highways which have an ability of good communication with the vehicles, so drivers avoid the hazards, can be the third step to afford AV.