Roundabout Designed and Built in 8 Months to Support New Development, Existing Businesses


A developer planned to build a new restaurant and retail development at the intersection of Golf Road and Golf Court that would attract heavy automobile traffic in a busy corridor that already struggled with congestion and access issues. The development’s opening date was coming up quickly, so accelerated project construction would be necessary. Yet the City of Delafield was committed to positioning the community to thrive, and they knew this was an important development.

The City was also sensitive to existing businesses on the corridor that would have to share in the costs of reconstruction. Fair assessments of existing businesses would be crucial. The project team knew they had to get creative with assessments, because traditional criteria to assess business owners for project costs was not feasible due to the layout of the existing businesses.


SEH was hired to review a Traffic Impact Analysis (TIA) and ultimately design and provide construction administration services for the needed improvements at the intersection of Golf Road and Golf Court in the City of Delafield. SEH and the City had determined that a traditional traffic signal would not have been as successful as a long-term solution given the overall goals for the corridor in terms of traffic and supporting economic development.

The team evaluated multiple alternatives before deciding on a roundabout, which was the best option to meet the needs of the developer and area businesses. Before moving forward with the roundabout, two important steps needed to be taken:

  • Stakeholder engagement: The roundabout was a more costly option, and parking and access would be affected for some existing businesses. Comprehensive stakeholder outreach resulted in all parties being open to the required changes. Effective stakeholder communication also resulted in a better return on investment for the developer and the City with this option.
  • Special assessments: Another key step was determining the best method of assessing business owners for the project cost. Traditional methods of assessment weren’t feasible. SEH and the City considered several non-traditional methods before identifying the most equitable option.

8-month timeline
The schedule was a crucial part of this project. An accelerated construction timeline was needed to meet the developer's opening date. Drawing on a strong working relationship between SEH and the City, along with clear communication with stakeholders and the developer, the team took the project from concept to substantial completion in just eight months.

Traffic control and thoughtful construction staging
The roundabout needed to be constructed while still being accessible to traffic. The project team challenged itself to find a cost-saving way to keep the intersection open to vehicles during construction. The team landed on using pulverized pavement during construction, a more economical option than temporary asphalt.

With the project now completed, area businesses, the developer, and users of Golf Road are happy with the improved traffic flow and access in what was previously a congested corridor.

Related Content: The Amazing World of Roundabouts

Golf Road and Golf Court Roundabout

Delafield, Wisconsin

City of Delafield


  • Design and construction oversight of single-lane roundabout
  • Review of traffic impact analysis (TIA)
  • Evaluation of multiple alternatives
  • 8-month accelerated timeline from concept to substantial completion
  • Proactive stakeholder engagement achieved buy-in from existing businesses
  • Revisions to existing stormwater pond
  • Innovative approach to special assessments
  • Constructed under traffic in busy commercial corridor with 7,900 AADT
  • Used pulverized pavement during construction to reduce costs


  • Civil engineering
  • Highway design
  • Mechanical/electrical engineering
  • Natural resource scientists
  • Structural engineering
  • Survey
  • Traffic engineering
  • Lighting design
  • Storm sewer design
  • Landscape design
  • Construction administration
  • Public involvement
  • Special assessments


  • 2021 Engineering Excellence Award from American Council of Engineering Companies of Wisconsin (ACEC-WI)

Golf Road

  • Intersection before photo – This photo shows the original configuration of the Golf Road and Golf Court intersection prior to construction.

  • Beginning of construction – This photo shows the early stages of construction. It highlights the cost-saving measure of utilizing pulverized pavement as a temporary roadway surface. It also highlights the reconfiguration of the existing retention pond to accommodate the realigned intersection.

  • Intersection roundabout during construction – This photo shows the mid-point of construction. The new configuration of the intersection is in place and vehicles are still running on the roadway base course.

  • Intersection roundabout final – This photo shows the intersection configuration post-paving. It shows newly configured pond and additional pedestrian accommodations installed to help connectivity between the different businesses in the area.

  • Access change final – This photo shows the overall scope of construction post-paving. As part of the project access, control changes were made to increase the overall safety of the corridor. These changes in access resulted in a heavy amount of business engagement both during design and construction.

  • Golf Road completed – This photo shows the finished project, including the development area that led to the need for the project. Project highlights include access control, increased pedestrian connectivity, parking lots and final landscaping features.