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13 th Street and Dayton Avenue – Ames, IA Intersection Study

13 th Street and Dayton Avenue – Ames, IA Intersection Study. ByungOck Kim Greg Karssen. 13 th Street and Dayton Avenue - Location. Approach # 4. 13 th STREET. D A Y T O N A V E. Approach #2. 13 th Street and Dayton Avenue – Lane Configuration. Approach #3.

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13 th Street and Dayton Avenue – Ames, IA Intersection Study

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  1. 13th Street and Dayton Avenue – Ames, IAIntersection Study ByungOck Kim Greg Karssen

  2. 13th Street and Dayton Avenue - Location

  3. Approach # 4 13th STREET D A Y T O N A V E Approach #2 13th Street and Dayton Avenue – Lane Configuration Approach #3

  4. 13th Street and Dayton Avenue – Images

  5. 13th Street and Dayton Avenue – Images Looking west Looking south Looking east Looking north

  6. 13th Street and Dayton Avenue – Traffic Volumes

  7. 13th Street and Dayton Avenue – Crash History Table 1: Crash Frequency MAJOR CAUSES (7) Failure to Yield ROW – Left Turn (4) Ran Traffic Signal (3) Following Too Close (Rear End) (2) Driving Too Fast for Conditions **Signalized intersection crashes… Table 2: Crash Types

  8. Crash Diagram • This diagram shows the • major injury crashes were angle collisions involving a turning vehicle and a vehicle proceeding through the intersection

  9. 13th Street and Dayton Avenue – Crash Countermeasures

  10. 13th Street and Dayton Avenue – Recommendation #1 • Left turn Signal phase • Evaluate signal times for left turns on EB/WB approaches • Provide exclusive left turns for NB/SB approaches…special concern for trucks and sight problems Looking north…imagine a truck here

  11. 13th Street and Dayton Avenue – Recommendation #2 • P-Turn, “quadrant intersections” • Unconventional turns • Two right turn movements (through-right-right) replace single left turn movement • Follow vehicle on street B as it moves to street A Source: FHWA

  12. 13th Street and Dayton Avenue – Recommendation #3 • Offset Left Turn Lanes • Improves sight distance for left-turning vehicles • The left turning vehicle can see around the opposing left turning vehicle

  13. Questions?? ?

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