Safety Review of Roundabouts in Alberta, Canada

摘要

The Province of Alberta has a relatively long history of using circular intersections. In the 1950's, the City of Edmonton constructed 12 two-lane rotaries on major arterial streets. These rotaries were designed to carry a high volume of traffic and lacked the deflection and other geometric features of modern roundabouts. Since these rotaries were constructed in the 1950's not many new circular intersections were constructed in Alberta until modern roundabouts starting appearing in North American in the 1990's and 2000's. Alberta now has over 75 modern roundabouts in use throughout the Province. Many of these roundabouts are located in City of Calgary where City Council has recently adopted a new roundabout policy that will encourage the use of roundabouts in appropriate locations. This new policy will ultimately result in more roundabouts being constructed in the Calgary in the coming years.