U.S. Department of Transportation
Federal Highway Administration
1200 New Jersey Avenue, SE
Washington, DC 20590
202-366-4000


Skip to content
FacebookYouTubeTwitterFlickrLinkedIn

Safety

eSubscribe
eSubscribe Envelope

FHWA Home / Safety / Intersection / Intersection Safety Roundabouts

Intersection Safety Roundabouts

Figure 23: Example Markings

This image consists of two diagrams, the first a single-lane roundabout and the second a double-lane roundabout, and is intended to provide guidance on the appropriate pavement and regulatory markings.

Diagram 1:

The figure shows a green central island surrounded by a circular roadway. 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, bordered by a solid yellow line, separates the opposing travel lanes of each road where it intersects the circular roadway. 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.

The roadway entering the roundabout from the north is shown with one lane on the right side of the splitter island entering the roundabout and one lane to the left exiting the roundabout. The roadways entering the roundabout from the west, south, and east are also shown with one lane on the right side of each splitter island entering the roundabout and one lane to the left exiting the roundabout.

There are no arrow markings on the diagram.

Diagram 2:

This figure illustrates markings for a two-lane roundabout with a double left turn.

The figure shows a green central island surrounded by a circular roadway. 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. 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.

The roadway entering the roundabout from the north is shown with two lanes on the right side of the splitter island entering the roundabout and one lane to the left exiting the roundabout. The roadways entering the roundabout from the west, south, and east are shown with two lanes on the right side of each splitter island entering the roundabout and two lanes to the left exiting the roundabout. The lanes entering the roundabout from the north are shown separated by a broken white line, which changes to a solid white line on both sides of the crosswalk. The lanes entering the roundabout from the south are shown separated by a solid white line, and the lanes exiting the roundabout to the south are shown separated by a broken white line, which changes to a solid white line on both sides of the crosswalk. The lanes entering and exiting the roundabout from the west and east are shown separated by a solid white line. White arrows are shown marked on the pavement of the each lane entering the roundabout in advance of the crosswalk. On the roadways entering the roundabout from the north, west, and east, a two-direction white arrow in each left lane is shown pointing to the left and straight ahead, and a two-direction white arrow in each right lane is shown pointing straight ahead and to the right. On the roadway entering the roundabout from the south, a left-turn arrow is shown marked on the pavement of the left lane, followed by the word "ONLY" and another left-turn arrow. On the roadway entering the roundabout from the south, three-direction arrows marked on the pavement of the right lane are shown pointing to the left, straight ahead, and to the right.

The circular roadway is shown as two lanes, with a solid white line separating the two lanes opposite the splitter islands and changing to a normal broken white line opposite the points where lanes from the roadways enter the roundabout. Opposite the splitter islands on the roadways from the north, west, and south, two-direction white arrows pointing to the left and straight ahead are shown marked on the pavement of the left lane, and white arrows pointing straight ahead are shown marked on the pavement of the right lane of the circular roadway. Opposite the splitter islands on the roadway from east, a white arrow pointing to the left is shown marked on the pavement of the left lane, and a two-direction white arrow pointing to the left and straight ahead is shown marked on the pavement of the right lane of the circular roadway.

Return to Figure 23.

Page last modified on December 1, 2015.
Safe Roads for a Safer Future - Investment in roadway safety saves lives
Federal Highway Administration | 1200 New Jersey Avenue, SE | Washington, DC 20590 | 202-366-4000