Project Selection Criteria

NSP Traffic Calming Procedures handout
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Phase 1: Changing Driver Behavior

1. Determine eligibility

  • Unincorporated Washington County

  • Classified as a local, neighborhood route or meets “residential collector” criteria

 

2. Recommend treatments

Potential recommendations include:

  • Speed trailer

  • Neighborhood Speed Watch program

  • Lawn signs

 

3. County may recommend Phase 2

  • If Phase 1 activities do not provide desired results

 

Phase 2: Changing the roadway environment

4. Determine eligibility

All roads:

  • Posted speed ≤ 35 mph

  • 85th percentile speed ≥ 5 mph over posted speed

Local streets or neighborhood routes:

  • Maximum of two lanes

  • ≥ 1,000 vehicles per day

Residential collectors:

  • Road length ≥ 500 ft

  • Residential property frontage

  • At least three of these:

    • ≥ 50 fronting properties/mile

    • On-street parking

    • No bike lane

    • No center two-way left-turn lane

 

5. Rank eligible projects

 

6. Circulate petition

  • 1 signature from each property owner

  • 51% must sign to move forward

 

7. Draft a traffic calming plan

  • Collaborate with neighborhood

 

8. Vote on traffic calming plan

  • 1 vote from each property 

  • Non-returned ballots = no “vote”

    • County mails ballots

    • 67% approval required to move forward

 

9. Share traffic calming plan

  • Traffic calming plan distributed by mail or at community meeting

 

10. Implement traffic calming plan

 

11. Finished

  • Review project results

 

NSP collects and analyzes data about existing conditions on all street segments referred to the program. For more information about the program please refer to the Neighborhood Streets Policy.

Request traffic calming