or 42 county line curves environmental assessment purpose and need february 17 2009
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OR 42: County Line Curves Environmental Assessment Purpose and Need February 17, 2009

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OR 42: County Line Curves Environmental Assessment Purpose and Need February 17, 2009. Purpose. The purpose of the project is to cost effectively address safety issues in the OR 42 corridor between mile posts 41.0 and 46.0. Need.

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purpose
Purpose

The purpose of the project is to cost effectively address safety issues in the OR 42 corridor between mile posts 41.0 and 46.0

slide3
Need
  • Crash rate is three times higher than state average for Rural Principal Arterial
  • Two Safety Priority Index System (SPIS) sites – east end of project:
    • Mile Post 45.02 to 45.19
    • Mile Post 45.75 to 45.85
  • Three fatal crashes (2004-2006)
slide4
Need
  • Safety Investment Program (SIP) sites:
    • Mile Post 41.0 to 45.0 = Category Two
    • Mile Post 45.0 to 46.0 = Category Three
    • Category Three, Four, or Five are prioritiesfor safety improvement funding
slide8
Need
  • Roadway geometry does not meet current design standards
  • At least 21 curves exceed the maximum degree of curvature for Rural Principal Arterial
goals
Goals
  • Improve safety in the corridor for all users
  • Develop cost-effective solutions
  • Improve traffic flow (mobility) through the project area
  • Minimize impacts to environmental resources
improve safety in the corridor for all users
Improve safety in the corridor for all users
  • Remove substandard curves and roadway geometry
  • Improve sight distance
  • Increase shoulder width
  • Mitigate geohazards (rock fall and slides)
develop cost effective solutions
Develop cost-effective solutions
  • Accommodate phased construction as funds are made available over time
  • Make use of the existing road and facilities where feasible
improve traffic flow mobility through the project area
Improve traffic flow (mobility) through the project area
  • Meet design standards
  • Meet projected travel demands for the vehicle types using the corridor for at least twenty years into the future
  • Reduce the number of locations with advisory speeds lower than the design speed
improve traffic flow mobility through the project area1
Improve traffic flow (mobility) through the project area
  • Maintain access to adjacent properties
  • Provide passing opportunities
  • Minimize travel delays and detours during construction
minimize impacts to environmental resources
Minimize impacts to environmental resources
  • Avoid or minimize potential impacts to unstable slopes that increase the potential for slides
  • Avoid or minimize impacts to native species and their habitats including those listed or proposed for listing under the Endangered Species Act
minimize impacts to environmental resources1
Minimize impacts to environmental resources
  • Avoid or minimize impacts to aquatic resources--which include the Middle Fork Coquille River, its floodplain and tributaries, and freshwater wetlands
  • Provide stormwater treatment and control
minimize impacts to environmental resources2
Minimize impacts to environmental resources
  • Minimize impacts to mature riparian vegetation
  • Avoid impacts to archaeological, historic, and cultural resources
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