Description

MnDOT Roundabout Design Workshop

Dates: 
May 23-25, 2023
Day One: 9:00 a.m.–4:00 p.m. Central
Day Two: 8:00 a.m.–4:00 p.m. Central
Day Three: 8:00 a.m.–4:00 p.m. Central

Location: 
MnDOT Shoreview Training and Conference Center
1900 County Road I West
Shoreview, MN 55126
United States

About the Event:
This three-day workshop is designed for engineers from both agencies and consulting firms who deliver
roundabout projects for MnDOT. The training will focus on chapter 6 of the MnDOT Facility Design
Guide. Its goal is to help participants use the MnDOT Geometric Design Support Unit's design approval
processes and improve their ability to analyze roundabout capacity, develop a layout, and predict an
alternate outcome of a design modification. This workshop will include hands-on training using drafting
exercises for simple, compact urban, mini, skewed, and 2+1 roundabouts.

At the training, participants will:

• Use guidelines and design preferences from chapter 6 of the MnDOT Facility Design Guide.
• Describe circle sizing and placement.
• List MnDOT Intersection Control Evaluation (ICE) documentation elements and discuss lane
• configuration and expandability.
• Compare computer software (CADD, HCM spreadsheet, etc) design examples with chapter 6 of
• the MnDOT Facility Design Guide.
• Discuss roundabout design performance parameters.
• Identify special roundabout considerations (oversized/overweight, ADA, longitudinal grades,
• maintenance, landscaping, signing, and high-speed approaches).
• Use layout sketching techniques and outline variation in design and design checking.
• The workshop curriculum features the following case examples:
• Simple Roundabout: SP 2510-55 TH 58 in Goodhue
• Compact Urban Roundabout: SP 6106-25 TH 29 in Glenwood
• Mini Roundabout: SP 5916-117 TH59 in Pelican Rapids
• Skewed Roundabout: SP 3609-48 TH 53 in International Falls/SP 1807-32 TH 210 in Crosby
• 2+1 Roundabout: SP 1008-104 TH 41 in Chaska

Questions? Contact Rachel Brodeur at brode080@umn.edu