TditilTraditional ItIntersecti on vs. Split Intersection
Split intersection divides one of the intersecting streets into 2 one‐way roads
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
Split Intersections
A split intersection divides into 2 one‐way roads – one of the intersecting creating two simpler streets… intersections
This one FUTURE USE still has left (open space) but some turns in the center ‐ have no lefts in center Split Intersection Busy iitntersecti on split iitnto 2 iitntersecti ons – now works on 2 signal phases instead of 4
Land uses remain intact
Can use existing streets and driveways Golden Triangle, NJ
Split Intersection
Through movements on highway
Left turns maneuver Signal Phase 1 around block
Golden Triangle, NJ Split Intersection
Signal Phase 2
Can accommodate all movements on cross streets Golden Triangle, NJ
Split Intersection
Through movements on highway
Left turns maneuver Signal Phase 1 around block
Golden Triangle, NJ Split Intersection
Signal Phase 2
Can accommodate all movements on cross streets Golden Triangle, NJ
Split Intersection Example: Blackfoot, ID
↖ to I‐15
Bridge and Judicial Streets ↗ Couplet creates turned into 1‐way street couplet split intersection ← with Main St
Assist Split Intersection Example: Waco, TX
Assist
Split Intersection Example: Waco, TX
Assist Split Intersection Example: Waco, TX
Assist
Split Intersection
Here are some examples of split intersection locations: o Burlington, NJ – Burlington Pike & High St o Golden Triangle, NJ –Crescent Blvd & Marlton Pike o Pennsauken, NJ –US 130 & Westfield/Camden Turnpike o Waco, TX – New Dallas Hwy & Industrial Blvd
See also: o Blackfoot, ID –Main St & Bridge/Judicial o Moscow, ID – Jackson/Washington & 3rd St
Assist Town Center Intersection A town center split intersection, intersection (tci) but both streets is similar to the are separated
FUTURE USE FUTURE USE (open space) (open space)
into 1‐way a 4 simple
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 Split Intersections Can be applied to new developments or in existing downtowns or neighborhoods with traditional grid street pattern Narrower streets good for TOD, peddiestrians Can use quality space in center or leave as open space
Thank You
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