WS 2 Presentation

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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…