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Traditional Intersections Vs. Town Center Intersections Traditional

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Traditional Intersections Vs. Town Center Intersections Traditional Traditional Intersections vs. Town Center Intersections Similar to Split Intersection ‐ roads are split into 1‐way streets and space in center developed or preserved Traditional Intersection Traditional iiintersection signal cycle has 4 phases – 2 for left turns 2 for through movements Traditional Intersection 4 Phase Signal Cycle Times* 10% 6% 22% 62% lefts straight through *average intersection 75% of the traffic (through movement) gets only about 60% of the cycle time Too much time spent on left turns and yellow signals (transition between movements) Innovative Intersection Innovative intersection signal cycles have only 2 (or 3) phases – left turns are moved or redirected Innovative Intersections create more green time 4 Phase Signal ItiInnovative 2 Phase Cycle Times Signal Cycle Times 6% 4% 10% 6% 22% 62% 90% lefts straight straight through through 75% ‐ 80% of traffic 100% of traffic gets 90% of time – gets only about 60% of time no waiting for left turns Town Center Intersection A town center split intersection, intersection (tci) but both streets is similar to the are separated FUTURE USE open or developed “Town Center” available FUTURE USE for public open or developed into 1‐way ora private 4 simple uses. streets, creating d intersections Assist Town Center Intersection A town center split intersection, intersection (tci) but both streets is similar to the are separated FUTURE USE open or developed “Town Center” available FUTURE USE for public open or developed into 1‐way ora private 4 simple uses. streets, creating d intersections Assist Town Center Intersection A town center split intersection, intersection (tci) but both streets is similar to the are separated FUTURE USE open or developed “Town Center” available FUTURE USE for public open or developed into 1‐way ora private 4 simple uses. streets, creating d intersections Assist Town Center Intersections: for Transit Oriented Mixed Use Centers o replaces one 4‐phase signal with four 2‐phase signals o narrower streets good for TOD, pedestrians o quality space in center TCI Development Continues School Residential Public Square LkLake San Marcos, CA TCIs at Daybreak Development Developing on west bhbench of Salt Lake Valley by Kennecott Town Center Intersection Highway into South Padre Island Visitors first iiimpression of the community is not a traffic signal, but a landscaped Town Center Intersection South Padre Island, TX TCI at Denver’s Stapelton Redevelopment th TCI at DenverDowntown’s 16 DenverStreet Mall Downtown Denver 16th Street Branded Shuttle carries over 50,000 passengers per day The TCI “Triplet” makes 16th Street possible TCI at Denver’s 16th Street Mall 16th street mall, ped/transit zone TCI Downtown Boise Potential for TCI development? Quality Space in center for Pedestrians Market Grove Bo‐Do TCI System Downtown Spokane Moscow, ID ← pullman original layout 3rd st/hwy 8 grid system aligned n/s (not with railroad) us 95 served as main street → 5 9 st/us heavy truck traffic conflicts with retail and on‐street parking main ← 3rd st/hwy 8 connects moscow & pullman u of idaho → 95 us Split Flow nst calming downtown – o ← pullman jacks preserving town center ← 3rd st/hwy 8 → st → st us 95 through traffic routed main to jackson & washington ← maintain on‐street parking washington and streetscape on main siilimilar applica tion in titwin fllfalls u of idaho 95 us ← Assist Town Center Intersection Portland, OR One of the worst intersections in Portland’ s urban area – 6‐points at Burnside, Sandy and 12th. Town Center Intersection Portland, OR One of the worst intersections in Portland’ s urban area – 6‐points at Burnside, Sandy and 12th. Solution – Vacate a portion of 13th and Sandy Create one‐way couplet with Burnside and Couch Route traffic around new town center Town Center Intersection Portland, OR One of the worst intersections in Portland’ s urban area – 6‐points at Burnside, Sandy and 12th. Solution – Vacate a portion of 13th and Sandy Create one‐way couplet with Burnside and Couch Route traffic around new town center Town Center Intersections Can be applied to new developments or in existing downtowns or neighborhoods with traditional grid street pattern Narrower streets good for TOD, pedidestrians Quality space in center Thank You For more information, visit compassidaho.org Air photos source: Google Earth and Bing Maps.
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