A feature like this would be extremely dangerous in "striped yellow" lanes (where you can pass into on-coming traffic). When you're passing like that, the speed

A feature like this would be extremely dangerous in "striped yellow" lanes (where you can pass into on-coming traffic). When you're passing like that, the speed limit goes out the window and your main goal is to get back into your lane before any on-coming cars come. Limiting speed would cause head on collisions because drivers wouldn't be able to pass.