Alternative design for Clackamas Road near I205OR212 Interchange

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Alternative design for Clackamas Road near
I-205/OR-212 Interchange

• Reasons for existing problem
• Method of discerning problem scope
• Proposed solutions
• Disclaimer

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Study Region 1
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Lane Geometry
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Driver confusion/surprise
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Illegal maneuvers to decrease delay
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Observed Truck Driver Responses
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Proposed Solutions

• On the sign for I-205 exit 12B, add NO EASTBOUND
  ACCESS or WESTBOUND ACCESS ONLY
• For Exit 12B, add NO TRUCK TURNAROUND to
  existing wording.

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Before After Signage
Before After
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Proposed Solutions (cont.)

• Stagger Exit 12A and 12B signs
• State distance to off-ramp on exit 12A sign

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Proposed Solutions (cont.)
Designate a truck rescue route
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Proposed Solutions (cont.)
Install concrete curb to prevent illegal U-turns