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Appendix A Page A-1 Roundabouts: An Informational Guide APPENDIX A EXAMPLE PAVEMENT MARKING DESIGNS FOR ROUNDABOUTS CONTENTS A.1 EXAMPLE PAVEMENT MARKINGS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-3
Roundabouts: An Informational Guide Page A-2 Appendix A LIST OF EXHIBITS Exhibit A-1 Example Markings for a Single-Lane Roundabout . . . . . . . . . . . . . A-3 Exhibit A-2 Example Markings for a Single-Lane Roundabout with a Dedicated Right-Turn Lane . . . . . . . . . . . . . . . . . . . . . . . . . . . A-4 Exhibit A-3 Example Markings for a Double-Lane Roundabout with Single-Lane and Double-Lane Approaches and with Extended Splitter Islands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-5 Exhibit A-4 Example Markings for a Double-Lane Roundabout with Single- and Double-Lane Approaches and with Central Island Extended by Pavement Markings . . . . . . . . . . A-6 Exhibit A-5 Example Markings for a Double-Lane Roundabout with Single- and Double-Lane Approaches and with Central Island Extended by Truck Apron . . . . . . . . . . . . . . . . A-6 Exhibit A-6 Example Markings for a Double-Lane Roundabout with Single-Lane Exits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-7 Exhibit A-7 Example Markings for a Double-Lane Roundabout with Double-Lane Exits (typical double-lane roundabout) . . . . . . A-8 Exhibit A-8 Example Markings for a Double-Lane Roundabout with Double Left-Turn Lane . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-9 Exhibit A-9 Example Markings for a Double-Lane Roundabout with Double Right-Turn Lane . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-10 Exhibit A-10 Example Markings for a Double-Lane Roundabout with Consecutive Double Left Turns . . . . . . . . . . . . . . . . . . . . . . . A-11 Exhibit A-11 Example Markings for a Three-Lane Roundabout with Two- and Three-Lane Approaches . . . . . . . . . . . . . . . . . . . . A-12 Exhibit A-12 Example Markings for a Three-Lane Roundabout with Three-Lane Approaches . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-13 Exhibit A-13 Example Markings for a Three-Lane Roundabout with Two-Lane Exits and Double Left Turns on All Approaches . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-14 Exhibit A-14 Example Markings for Two Linked Roundabouts . . . . . . . . . . . . A-15 Exhibit A-15 Example Markings for a Diamond Interchange with Two Circular-Shaped Roundabout Ramp Terminals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-16 Exhibit A-16 Example Markings for a Diamond Interchange with Two Raindrop-Shaped Roundabout Ramp Terminals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-17
Appendix A Page A-3 Roundabouts: An Informational Guide A.1 EXAMPLE PAVEMENT MARKINGS Exhibits A-1 through A-16 illustrate examples of markings for roundabouts with various geometric design and lane-use configurations from the 2009 Manual on Uniform Traffic Control Devices (see Chapter 7 for reference). This series of exhibits is not an exhaustive set of examples of every possible roundabout config- uration. However, the examples show many complex lane-use arrangements and do a good job of illustrating the general principles for marking roundabouts as described in Chapter 7. Most importantly, the examples illustrate how drivers can choose the appropriate lane when entering a roundabout and not need to change lanes within the circulatory roadway before exiting in their desired direction. Exhibit A-1 Example Markings for a Single-Lane Roundabout
Roundabouts: An Informational Guide Page A-4 Appendix A Exhibit A-2 Example Markings for a Single-Lane Roundabout with a Dedicated Right-Turn Lane
Appendix A Page A-5 Roundabouts: An Informational Guide Exhibit A-3 Example Markings for a Double-Lane Roundabout with Single-Lane and Double- Lane Approaches and with Extended Splitter Islands
Roundabouts: An Informational Guide Page A-6 Appendix A Exhibit A-4 Example Markings for a Double-Lane Roundabout with Single- and Double-Lane Approaches and with Central Island Extended by Pavement Markings Exhibit A-5 Example Markings for a Double-Lane Roundabout with Single- and Double-Lane Approaches and with Central Island Extended by Truck Apron
Appendix A Page A-7 Roundabouts: An Informational Guide Exhibit A-6 Example Markings for a Double-Lane Roundabout with Single-Lane Exits
Roundabouts: An Informational Guide Page A-8 Appendix A Exhibit A-7 Example Markings for a Double-Lane Roundabout with Double-Lane Exits (typical double-lane roundabout)
Appendix A Page A-9 Roundabouts: An Informational Guide Exhibit A-8 Example Markings for a Double-Lane Roundabout with Double Left-Turn Lane
Roundabouts: An Informational Guide Page A-10 Appendix A Exhibit A-9 Example Markings for a Double-Lane Roundabout with Double Right-Turn Lane
Appendix A Page A-11 Roundabouts: An Informational Guide Exhibit A-10 Example Markings for a Double-Lane Roundabout with Consecutive Double Left Turns This example shows that in some situations with unusual lane assignment, it may be necessary to increase the number of lanes within the circulatory roadway for the sole purpose of achieving the goal of allowing drivers to choose the appro- priate lane on the approach and follow that lane to their desired exit.
Roundabouts: An Informational Guide Page A-12 Appendix A Exhibit A-11 Example Markings for a Three-Lane Roundabout with Two- and Three-Lane Approaches
Appendix A Page A-13 Roundabouts: An Informational Guide Exhibit A-12 Example Markings for a Three-Lane Roundabout with Three-Lane Approaches
Roundabouts: An Informational Guide Page A-14 Appendix A Exhibit A-13 Example Markings for a Three-Lane Roundabout with Two-Lane Exits and Double Left Turns on All Approaches
Appendix A Page A-15 Roundabouts: An Informational Guide Exhibit A-14 Example Markings for Two Linked Roundabouts
Roundabouts: An Informational Guide Page A-16 Appendix A Exhibit A-15 Example Markings for a Diamond Interchange with Two Circular-Shaped Roundabout Ramp Terminals
Appendix A Page A-17 Roundabouts: An Informational Guide Exhibit A-16 Example Markings for a Diamond Interchange with Two Raindrop-Shaped Roundabout Ramp Terminals
