Intersection ConceptsN. 88th Street Intersection (new signalized intersection)

N. Green Lake Drive (existing signalized intersection)

Concept B - Offset SignalsPros• Crossing island for peds• Left turn phase provides lead phase for ped crossing• Full access for 87th and 88th (east) streetsCons• EB/WB must yield to peds• Requires inter-tie of the signals (1 controller)

Concept A - BasicPros• Full access to N. 88th (east) street• Left turn phase provides lead phase for ped crossing (south leg)• Crossing island for south ped crossign on AuroraCons• Rights only at 87th and 88th Streets (west)

Concept C - U-turn IslandPros• Protected ped phase without yielding vehicles• Minimizes signal phases• Maximum greening of the medianCons• Loss of left turn access in/out on N. 88th (east)• Long u-turn phase (equal to ped x-ing time)• Right turns only from side streets

Concept B - Box & IslandPros• Shorter crossing distances for peds• Keeps full access for eatbound 83rdCons• Doesn’t address 85th Street northbound left turn• Peds may be trapped on island

Concept C - TrianglePros• Allows longer left turn pocket for

northbound 85th Street• Elinimates N. 83rd westbound right lane• Moves south crosswalk to square up

intersection

Concept A - BasicPros• Better for peds, cleaner intersectionCons• Doesn’t address 85th Street northbound left turn pocket• No ped crossing island on Aurora

Cons• Higher cost• Impacts on residential on

N 82nd Street• Potential impact of new

signal

A u r o r a A v e n u e L a n d U s e V i s i o n i n g a n d U r b a n D e s i g n S t u d y

January 30, 2009

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1” = 30’

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