ws 2 presentation

8/8/2019 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



Why here? Why now?Why here? Why now?

(See Project YouTube Video)



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



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



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



Project ProcessProject Process

WE ARE HERE



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Alternatives Development ProcessAlternatives Development Process



Corridor Design 101Corridor Design 101

Roadw ay Design Basics

Horizontal alignment

Vertical alignment

Roadway cross-sections

Intersection treatments

Intersection spacing



Horizontal AlignmentHorizontal Alignment

Maximum degree of curve based on speed



Vertical AlignmentVertical Alignment

Maximum Roadway Grades

8% for arterial

roadways12% for collector/local roadways



Roadway ProfileRoadway Profile

Sight distancerequirements

Vertical curve design



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



Roadway Cross SectionsRoadway Cross Sections

Source: City of Happy Valley TSP

Typical 3-lane arterial roadway



Other Streetscape FeaturesOther Streetscape Features

Drainage considerations



Other Streetscape FeaturesOther Streetscape Features

Retaining wall to minimizeimpacts



Streetscape ExamplesStreetscape Examples

SE 172nd Avenue (South of Sunnyside)




SW Walker Road




SW Kruse Way



Intersection OptionsIntersection Options

Roundabouts

Trafficsignals

Stop signs



Intersection SpacingIntersection Spacing

Minimum Intersection Spacing

– Arterial & collectors intersections – 1,000 feet

– Local street intersections – 500 feet



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



TopographyTopography

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Natural ResourcesNatural Resources

E i i C S i



Existing Cross-SectionExisting Cross-Section

172nd Avenue

E i i C S iE i ti C S ti



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



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



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



Planned Transportation NetworkPlanned Transportation Network

Planned Transportation Network (north)Planned Transportation Network (north)



Planned Transportation Network (north)Planned Transportation Network (north)

Planned Transportation Network (south)Planned Transportation Network (south)



Planned Transportation Network (south)Planned Transportation Network (south)

Future Land UseFuture Land Use



Future Land UseFuture Land Use

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Now Let’s Create Some Corridor Design ConceptsNow Let’s Create Some Corridor Design Concepts



Now Let s Create Some Corridor Design Concepts…Now Let s Create Some Corridor Design Concepts…

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