W. Quincy Ave. & S. Simms St.

Jefferson County, CO

  • BACKGROUND

    MTJ Roundabout Engineering was retained by Jefferson County to provide design mitigations to improve driver comprehension and reduce the number of crashes at the Quincy/Simms roundabout near Denver.

  • RESULTS

    The MTJ design modification recommendations were predicated on:

    Improving driver comprehension to mitigate driver errors

    Matching capacity to demand to reduce conflict points

    Simplifying drivers’ decision-making

    Adhering to roundabout geometric safety principles

    Best practices for roundabout signing and marking

Highlights

  • Improved driver guidance

  • Reduced conflict points

  • Improved operations

  • Improved safety design

  • Simplified driver decision-making

MTJ also conducted a review of the nearby Simms/Nassau roundabout, and developed concept-level recommendations to ensure:  lane continuity between the roundabouts and the US-285 interchange ramp, simplified driver decision-making, and improved safety performance.

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