TRAFFIC CIRCLE (Mini)

(AKA; Raised Junctions, Intersection Humps)

Description:

A traffic circle is a raised island located in the centre of an intersection
around which traffic must circulate.   They are sometimes landscaped in
the centre.  The outer ring is usually mountable so large vehicles can
navigate the otherwise small curb radii.   Traffic circles are generally
located within the existing paved area of the intersection.   They can
effectively reduce speeds and volumes if used in series.

---

Purpose:

Reduce vehicle speeds
Reduce vehicle-vehicle conflicts at intersections.

---

Application:

Local streets and some collector streets

---

Type of Problem (Addresses):

Primary Speed Vehicle conflicts

Secondary Volume

---

COST:

Approx: $10,000.

---

Advantages: Reduces vehicle speed Reduces vehicles conflicts Landscaped Island Can Enhance Streetscape

Disadvantages: Comparatively Expensive Measures Can direct vehicles into unmarked crosswalk area on narrower streets Cyclists may feel "squeezed" by motor vehicles trying to pass at a traffic circle Can restrict access for large vehicles Can slow emergency vehicles Some traffic may be diverted to adjacent streets that do not have traffic calming measures Maintenance more difficult, especially snow removal

---

Design and Program Guidelines/Warrants:

Canadian Guide to Neighbourhood Traffic Calming, Transportation
Association of Canada, Ottawa, Canada, December 1998.