Mini-roundabout signing considerations

Due to their small size and unique features, mini-roundabouts require a somewhat different signing treatment than the larger urban roundabouts. The principal differences in signing at mini-roundabouts as compared to other urban roundabouts are the following:

• The central island is fully mountable. Therefore, no ONE WAY signs, Large Arrow signs, or chevrons can be located there. It is recommended that the direction of circulation be positively indicated through the use of pavement markings.
• The splitter islands are either painted or are fully mountable. Therefore, KEEP RIGHT signs are not appropriate for mini-roundabouts.
• Typically, advance directional guide signs and exit guide signs are unnecessary, given the size of the mini-roundabout and the nature of the approach roadways (generally low-speed local streets). However, standard street name signs (D3) should be used.
• The Roundabout Ahead warning sign discussed in Section 7.1.3.1 should be used on each approach in advance of the YIELD sign. The Circular Intersection warning gives no indication of the direction of circulation required at the mini-roundabout.

Exhibit 7-18 gives a sample signing plan for a mini-roundabout.