About this project
The scope of this study will include the development of design concepts and conceptual level layouts for approval from the Washington and Ramsey County Boards, City of Oakdale Council, City of North St. Paul, and the state. This work will include determining design concepts (including intersection and interchange concepts) and forecasting traffic using the Washington and Ramsey County Model/Regional Model. After the preferred concepts are identified the contractor will prepare concept level layouts for the three concepts.
The three interchange configuration alternatives will include at least one interchange alternative that can serve both Hwy 120 and Hadley Avenue. An evaluation of each alternative will be developed to assist in the preferred alternative selection process at a later date.
In addition, the study will analyze the Hwy 120 corridor, between Holloway Avenue and 20th Avenue East, in the City of North St. Paul. The analyses will compare, but not be limited to, a review of traffic operations. The review will include level of service, access management alternatives (developed in accordance with State policies), right-of-way implications with a suggested implementation timeframe and cost.
Work included within the study includes the following:
- Preparation of preliminary concept analysis
- Traffic forecasts that use the state's 2006 guidelines
- Determine capacity level of service for each concept
- Develop approximate construction limits for each preferred concept
Preferred concepts will need to consider alignment, profile, cross-section, preliminary bridge to adequately define the geometrics, impacts and right-of-way needs of the concept. Each concept will also include the design of sidewalks and trails.