There are some important unanswered questions about advisory lanes from which we can draw on the experience of the Netherlands and other European countries. The Dutch have more than 50 years’ experience with advisory lanes, and in recent years four variations have evolved as planners aim to push safety and comfort to higher levels. We’ll review Dutch experience, learning about their four types of advisory lanes and about recent trends in making them safer, and see what Dutch, Swiss, and British experience have to tell us about: What traffic speed and volume limits apply to advisory lane roads? Can advisory lanes be an all ages & abilities treatment? What sight distance requirements apply, if any, when advisory lanes are applied on curved roads? How does intersection density affect advisory lane applicability? What instructions should be given to drivers? Is there a difference between an edge lane and an advisory lane?