The Tigard Neighborhood Traffic Management Plan will focus on identifying neighborhood traffic issues and concerns. The plan will result in a comprehensive, prioritized list of citywide traffic calming projects with concept designs, cost-estimates, and city refinement opportunities. This project will fall under the City of Tigard’s Safe Streets for All (SS4A) Action Plan, which will build off Resolution No. 23-25 to eliminate traffic deaths and serious injuries using a safe systems approach to prioritize transportation safety.

Speeding is a significant contributor to roadway deaths and is particularly hazardous to pedestrians. In line with the safe systems approach, Tigard recently implemented a 20 is Plenty program reducing neighborhood speed limits from 25 to 20 mph. The combination of a reduction in regulatory speeds and traffic calming improvements will promote safety and livability in residential neighborhoods.

• Incorporate public input from residents, particularly underserved communities, in the Neighborhood Traffic Management Plan.
• Meet project budget and schedule requirements.

SCHEDULE

1. Data Collection and Analysis - Baseline data may be collected where appropriate to determine the ‘before’ conditions of the roadway. Data will be analyzed for the neighborhood streets.
2. Location Selection – Select priority streets within each neighborhood where speeding or neighborhood transportation concerns have been raised by Tigard residents and/or identified through the analysis.
3. Information Sharing and Public Input – Tigard residents will receive information about the City’s traffic calming priorities for each neighborhood and may provide feedback or ask questions.
4. Workshops – The City will host several workshops for each neighborhood for Tigard residents to provide feedback.
5. Supplemental Analysis – Additional data may be collected where identified through the workshops.
6. Design and Installation - The traffic calming measures are designed and then installed along the selected roads.

Traffic calming refers to a set of design interventions aimed at slowing or diverting car traffic to improve safety for all road users. Traffic calming supports the livability and vitality of an area by improving non-motorist safety, mobility, and comfort. It encourages more responsible driving and can potentially reduce traffic flow.

• Safety: By reducing vehicle speeds and volumes, traffic calming measures significantly decrease the likelihood and severity of collisions.
• Quality of Life: Traffic calming can enhance the quality of life in a neighborhood by reducing noise and air pollution from vehicles.
• Active Transportation: Slower traffic speeds make streets safer for walking and biking, which encourages healthier modes of transportation.
• Environmental Impact: Encouraging active transportation can reduce the carbon footprint of transportation, contributing to environmental sustainability.

TRAFFIC CALMING

Traffic calming can be achieved by horizontal deflection, vertical deflection, street width reduction, routing restriction, or feedback signs and beacons, to cause motorists to slow down and navigate safely. The project team will be looking for feedback on the following traffic calming measures:

Horizontal deflection introduces a shift or curve in the roadway.  

• Lateral Shift: Separates opposing traffic with a median island.
• Chicane: Series of two or three curb bulbs, placed on alternating sides of the street and staggered to create a curved one-lane segment of road.
• Realigned Intersection: Changes in alignment to convert T-intersections with straight approaches into curving streets.
• Traffic Circle: Raised island located in the center of an intersection around which traffic must circulate.

 
Traffic Circle: SW River Terrace Boulevard & SW Appledale Road

Vertical deflection introduces a shift in the vertical alignment of the roadway.

• Speed Hump: Rounded, raised areas spanning the entire width of the road.
• Speed Table: Raises the entire wheelbase of a vehicle. Speed tables are longer than speed-humps and flat topped.
• Raised Crosswalk: Ramped speed table spanning the entire width of the road. The crosswalk is demarcated with paint or special paving materials.
• Raised Intersection: Raises the entire intersection to slow down traffic.

 
Speed Hump: SW 103rd Avenue & SW Kent Street

Street width reduction reduces the width of the travel lane on a street.

• Corner Extension/Choker: Horizontal extension of the sidewalk to narrow the road for a section of the street.
• Median Island: Raised island located along the street centerline.
• On-Street Parking

Median Island: SW River Terrace Boulevard

Routing restriction prevents certain vehicle movements at intersections to reduce cut-through traffic.

• Diagonal Diverter: Barriers placed diagonally across an intersection, blocking through movement and left turns.
• Full/Half Closure: Closing the street to through traffic.
• Median Barrier: Physical barriers placed in the middle of the street.
• Forced Turn Island: Islands preventing certain movements at an intersection.

Feedback signs and beacons provide real-time feedback to drivers.

• Speed Feedback: Signs provide drivers feedback about their speed.
• Rectangular Rapid Flashing Beacons (RRFB): Two flashing beacons with an altering high frequency when activated to enhance the conspicuity of pedestrians at the crossing.

Speed Feedback: SW Locust Street at Metzger Elementary School

• Complete the online survey 
• Attend an upcoming workshop in your area (meeting locations and dates coming soon)