11.A.
City Council Meeting - FINAL
- Meeting Date:
- 02/16/2021
- Co-Submitter:
- Jeff Bauman
- From:
- Jeremy DeGeyter, Project Manager
Information
TITLE
Fourth Street-Lockett Road-Cedar Avenue Roundabout Alternatives Discussion
STAFF RECOMMENDED ACTION:
This item is for discussion only (see attached presentation).
EXECUTIVE SUMMARY:
The Arizona Department of Transportation (ADOT) will administer the design and construction and advertise, bid and award the construction of a roundabout at the signalized intersection of Fourth Street and Cedar Avenue/Lockett Road as part of a competitive Highway Safety Improvement Program (HSIP) grant award. This project was identified as a high priority through a local network crash data screening process. The roundabout will improve safety, slow speeds, help avoid angle crashes, and add a crosswalk at the 4th-leg of the intersection. The total HSIP Federal Funding is estimated to be $1,928,366 and the total City funding is estimated to be $60,813. The City is responsible for any project costs in excess of the current HSIP grant award of $1,928,366. The Intergovernmental Agreement (IGA) between the City of Flagstaff and ADOT was approved by City Council at the May 19, 2020, City Council meeting.
ADOT selected AZTEC Engineering Group for the design phase of the project. Preliminary project design began in November 2020 and has produced several preliminary/conceptual roundabout design alternatives. Two alternatives are presented for discussion. These alternatives have previously been presented to the Bicycle Advisory Committee, Pedestrian Advisory Committee, Mountain Line (NAIPTA), and the Transportation Commission. The two alternatives have notably different Right-of-Way (ROW) acquisition costs due to the acquisition of a single-family residence for the single roundabout option. Costs have not been determined; however it is anticipated that the ROW cost difference between the alternatives could be as much as $400,000 and would exceed the current ROW acquisition budget of $123,211. The City is responsible for any project costs in excess of the current HSIP grant.
ADOT selected AZTEC Engineering Group for the design phase of the project. Preliminary project design began in November 2020 and has produced several preliminary/conceptual roundabout design alternatives. Two alternatives are presented for discussion. These alternatives have previously been presented to the Bicycle Advisory Committee, Pedestrian Advisory Committee, Mountain Line (NAIPTA), and the Transportation Commission. The two alternatives have notably different Right-of-Way (ROW) acquisition costs due to the acquisition of a single-family residence for the single roundabout option. Costs have not been determined; however it is anticipated that the ROW cost difference between the alternatives could be as much as $400,000 and would exceed the current ROW acquisition budget of $123,211. The City is responsible for any project costs in excess of the current HSIP grant.
INFORMATION:
The Fourth Street-Lockett Road-Cedar Avenue Roundabout Alternatives presentation will provide information including:
- Project Background and History
- Roundabout Benefits and Design Considerations
- Alternatives Considered
- Decision Matrix
- Next Steps