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Public Workshop #2Public Workshop #2Octob er 2 0 10
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Meeting AgendaMeeting Agenda
Why are we here?
Corridor Design 101
Alignments and Streetscapes
Opportunities and ConstraintsFuture Plans
Workshop – 2 topics
Alignments and Streetscapes
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Why here? Why now?Why here? Why now?
(See Project YouTube Video)
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Pu r po se o f Th is Pr o j ect Pu r p ose o f Th is Pr o j ect
Address corridor congestion and safety problems
Serve future north-south traffic
Serve expected population growth in the area– Damascus
– Happy Valley
– Pleasant Valley Plan area
– Gresham
Serve the growing demand for regional travel
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Cor r ido r A l ign m ent Goa ls Cor r ido r A l ign m ent Goa ls
Improve mobility for:Through traffic
Local community
Freight traffic
Minimize impacts to:
Environmental resourcesCultural resources
Social
Provide flexibility for:
Changing socio-economic conditions
Development opportunities
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St r eet scape Goals St r eet scape Goals
Provide an aesthetically pleasing design. . .
That supports the character of the adjoining land
uses
That preserves rural character
Integrate “green streets” design with the naturalfeatures
Improve safety for all users
Support healthy and walkable communities
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Project ProcessProject Process
WE ARE HERE
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Alternatives Development ProcessAlternatives Development Process
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Corridor Design 101Corridor Design 101
Roadw ay Design Basics
Horizontal alignment
Vertical alignment
Roadway cross-sections
Intersection treatments
Intersection spacing
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Horizontal AlignmentHorizontal Alignment
Maximum degree of curve based on speed
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Vertical AlignmentVertical Alignment
Maximum Roadway Grades
8% for arterial
roadways12% for collector/local roadways
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Roadway ProfileRoadway Profile
Sight distancerequirements
Vertical curve design
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Roadway Cross-SectionsRoadway Cross-Sections
Lane width requirements• Travel lane – 11-12 feet
• Center turn lane – 12-14 feet
• Bike lanes – 6 feet on both sides
• Sidewalks – 6-8 feet
• Landscape strip – 5-7 feet
Source: City of Happy Valley TSP
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Roadway Cross SectionsRoadway Cross Sections
Source: City of Happy Valley TSP
Typical 3-lane arterial roadway
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Other Streetscape FeaturesOther Streetscape Features
Drainage considerations
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Other Streetscape FeaturesOther Streetscape Features
Retaining wall to minimizeimpacts
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Streetscape ExamplesStreetscape Examples
SE 172nd Avenue (South of Sunnyside)
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Streetscape ExamplesStreetscape Examples
SW Walker Road
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Streetscape ExamplesStreetscape Examples
SW Kruse Way
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Intersection OptionsIntersection Options
Roundabouts
Trafficsignals
Stop signs
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Intersection SpacingIntersection Spacing
Minimum Intersection Spacing
– Arterial & collectors intersections – 1,000 feet
– Local street intersections – 500 feet
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Corridor Opportunities and ConstraintsCorridor Opportunities and Constraints
Discussed in
– Stakeholder interviews
– Memos on existing conditions
– Memos on projected future conditions
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Future Transportation Conditions -- 2035Future Transportation Conditions -- 2035
Projections in Project Study Area
– Households grow by more than 300%
– Jobs grow by 1,200%– Virtually all intersections fail during peak hours
Projected Average Daily Traffic (ADT)
– 16,000 vehicles/day (south of Foster Rd)
– 25,000 vehicles/day (north of Sunnyside Rd)
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Existing Transportation ConditionsExisting Transportation Conditions
Traffic volumes– 172nd Avenue: 8,500 vehicles /day (near Hemrick Rd)
– Foster Road : 7,500 vehicles /day (near Cheldelin Rd)
– SE Sunnyside Road: 9,000 vehicles /day (near 172nd Ave)
All intersections operate acceptably except Foster
Road/172nd Avenue (LOS F)
Intersection crash rates are within normal levels
There are no bike lanes or sidewalks
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TopographyTopography
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Natural ResourcesNatural Resources
E i i C S i
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Existing Cross-SectionExisting Cross-Section
172nd Avenue
E i i C S iE i ti C S ti
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Existing Cross-SectionExisting Cross-Section
190th Avenue
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Oth O t iti d C t i tOth O t iti d C t i t
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Other Opportunities and ConstraintsOther Opportunities and Constraints
10 historical resources eligible for National Register of Historic Places
– Generally located along Foster Rd
No recorded archaeological sites
F t Pl f C idF t Pl f C id30
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Future Plans for CorridorFuture Plans for Corridor
Regional Transportation System Plan
Local Transportation System Plans
Local Comprehensive Plans
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Planned T anspo tation Net o kPlanned Transportation Network
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Planned Transportation NetworkPlanned Transportation Network
Planned Transportation Network (north)Planned Transportation Network (north)
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Planned Transportation Network (north)Planned Transportation Network (north)
Planned Transportation Network (south)Planned Transportation Network (south)
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Planned Transportation Network (south)Planned Transportation Network (south)
Future Land UseFuture Land Use
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Future Land UseFuture Land Use
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Now Let’s Create Some Corridor Design ConceptsNow Let’s Create Some Corridor Design Concepts
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Now Let s Create Some Corridor Design Concepts…Now Let s Create Some Corridor Design Concepts…
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