Neighborhood Streets Program: Selection Criteria

NSP Traffic Calming Procedures handout

Phase 1: Changing Driver Behavior

1. Determine eligibility

Streets must be: 

  • In unincorporated Washington County, outside of city limits

  • Classified as a local, neighborhood route or meet “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 road environment

4. Determine eligibility

All roads must have

  • Posted speeds ≤ 35 mph

  • 85th percentile speeds ≥ 5 mph over posted speed

"Local streets" or "neighborhood routes" must have:

  • Maximum of two lanes

  • ≥ 1,000 vehicles per day

"Residential collectors" must have:

  • 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

  • Only one 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

  • One 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


Neighborhood Streets Program staff collects and analyzes data about existing conditions on all street that are part of the program. Find more information in the Neighorhood Streets Policy.

Request Neighbhorhood Streets Program services