A Woonerf is an inclusive and liveable street and has its origins in the Netherlands. Living streets are known elsewhere by other names. In his article, See the article for more and for a list of references on street design. provides four key principles of a Woonerf: visible entrances, physical barriers (to slow traffic), shared and paved space, and landscaping and street furniture. While all this sounds wonderful there is a downside of cost. It requires extra engineering and ongoing maintenance. However, Steinberg argues this cost is offset by other factors.