Concept Evaluation: 210

Concepts 1 and Concept 5/5B were further evaluated with respect to future traffic operations, safety effects, and planning-level cost estimates. Refined concept drawings were also prepared that consider the area’s topography and the geometric and traffic control needs at the study intersections. These drawings and a summary table of the evaluation are provided in the exhibits on the right-hand side of the page.

CONCEPT EVALUATION

Concept 1 Advantages:

• Outperforms Concept 5/5B in addressing the limited intersection spacing between the westbound I-84 ramp terminal and Kirk Avenue by removing Kirk Avenue Access to OR-11
• Addresses the limited intersection spacing between the eastbound ramp terminal and Nye Avenue by relocating Nye Avenue approximately 125 feet south of the existing alignment
• Reduces crash potential in the interchange study area

Concept 1 Disadvantages:

• This concept has a higher level of right-of-way impact due to frontage roads, a new ramp terminal intersection, and the relocation of Nye Avenue
• This concept is significantly more expensive than Concept 5/5B
• The scale of the project is comparatively large with many unknown complexities
• The location of the new interchange may not meet FHWA spacing standards

Concept 5/5B Advantages:

• Reduces crash potential in the study area; the expected safety benefit is greater than for Concept 1
• Outperforms Concept 1 on most evaluation criteria
• Provides access to developments northeast of Exit 210 with only moderate right-of-way impacts
• Could be constructed without affecting operation of the interchange
• Significantly less expensive than Concept 1

Concept 5/5B Disadvantages:

• Does not address the limited intersection spacing between the westbound ramp terminal and Kirk Avenue as well as Concept 1

PROPOSED ACCESS MANAGEMENT PLAN

In addition to the preliminary concept recommendations described above, the project team has developed preliminary access management plans for the Operations and Access Study Area (OASA). A summary of the Draft Access Management Plan is provided in the exhibits on the right-hand side of the page.

The plan aims to move access locations in the OASA towards ODOT’s access spacing standards through consolidation of driveways and relocation of public streets. Implementation of access management is anticipated to occur through the development and redevelopment of properties over time.

Once you are finished reviewing this information, please continue to the Purple Room: Proposed Concepts for Exit 210 to provide input that will be used to create the preferred alternative and Access/Land Use Management Plans.