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Rodel is based on research and field observations taken by the Transport Research Laboratory (TRL). This includes investigation of approximately one million vehicles at 86 roundabout sites during 11,000 minutes of "at capacity" operation. Study results are summarized by lead researcher Dr. Rod Kimber in The Traffic Capacity of Roundabouts (TRL, 1980).

Rodel licenses the equations developed by this research directly from the TRL for use within the foundation of Rodel. The software also incorporates major advances made in the roundabout design field — including environmental and economic constraints — to create a diverse package of useful tools for engineers and planners.

Who is using Rodel?

A sampling of our varied and valued customers:

Alaska DOT
Alberta Transportation
Arizona DOT
Arkansas DOT
California DOT
Colorado DOT
Dakota Co., MN
Douglas Co., CO
El Paso Co., CO
Federal Highway Administration
Georgia DOT
City of Greeley, CO
City of Kenosha, WI
City of Little Rock, AR
City of Loveland, CO
City of Madison, WI
Michigan DOT
Minnesota DOT
City of Modesto, CA
NIRPC, Indiana
City of Red Deer, AB
South Carolina DOT
City of Springfield, OR
Strathcona Co., AB
Washington (state) DOT
Wisconsin DOT