2009 Edition Part 3 Figure 3C-3. Example of Markings for a One-Lane Roundabout
Figure 3C-3. Example of Markings for a One-Lane Roundabout
This figure illustrates markings for a one-lane roundabout.
The figure shows a green central island surrounded by a circular one-lane roadway. The central island is noted as "might also be mountable or painted yellow." A narrow band shown as composed of a contrasting pavement texture separates the island from the circular roadway.
Roadways are shown entering the roundabout from the north, south, east, and west. A narrow landscape buffer borders the outsides of the roadways. A triangular splitter island separates the opposing travel lanes of each road where it intersects the circular roadway. The splitter island on the roadway entering from the west is labeled "mountable or painted yellow." The splitter island on the roadway entering from the east is labeled "formed by two sets of double yellow lines." A crosswalk composed of a row of closely spaced white lines parallel to the flow of traffic is shown crossing all lanes and the narrow part of each splitter island.
Around the outer edge of the circular roadway, a solid white line is shown across the base of each splitter island, a wide dotted white line is shown intersecting each of the entering lanes, and no line is shown intersecting the exiting lanes.
On each roadway entering the roundabout and between the crosswalk and the dotted white line across the entrance to the roundabout, a yield line of white triangles is shown and marked as "optional." A two-direction white arrow pointing to the left and straight ahead, labeled "optional," is shown marked on the pavement of the roundabout at the base of each splitter island.
On the roadway entering the roundabout from the south, the opposing travel lanes are separated by a solid double yellow line and a solid white line is shown separating the two lanes that enter the roundabout. White right-turn arrows are shown marked on the pavement of the rightmost lane entering the roundabout in advance of the crosswalk and the white yield line.