Successful roundabout solutions require specialized expertise that is based on both qualitative guidelines and specific standards. As a nationally recognized expert, our engineers understand the importance and interdependence of the sizing, markings, landscaping, and geometric design of roundabouts. Our experience has proven that a robust roundabout design requires an iterative process to achieve a balanced design that not only meets standards and guidelines, but also achieves the client’s short- and long-term goals.
Our firm has covered the full range of plan development, design, and construction oversight services for more than 250 roundabouts in the past 15 years. Our roundabout engineers are unique because of their combined expertise with roundabout geometric design and traffic engineering. In addition, many of our roundabout projects are part of systems with closely spaced roundabouts along urban roadways or at freeway interchanges. To fully address safety and congestion issues, we perform complex microsimulation modeling for closely spaced roundabout corridors to provide a deep understanding of the interaction between intersections and reassurance that the roundabout solution is effective and long lasting for our clients. We understand when roundabouts are appropriate and tailor the design to address specific needs.
As a reputable leader, we have also been involved in the review of more than 100 roundabouts designed by other firms, demonstrating that our clients trust in our experience and knowledge to assist them in further development of roundabout applications. Our role in authoring several agency standards for roundabout design is a testament that we continue to be a top performer in roundabout advancement throughout the nation.