Katrina. Katrina... 2/27/2009 4
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1
2 Some History Concept Developed over 25 Years Ago Featured in Numerous Research Efforts & Publications Over 60 Currently Operating AASHTO s 2002 National Award for Innovation
3 More History 2002 LADOTD and ABMB Began Discussing Possible CFI Applications To make a Long, Long Story Short, Construction of the Airline / Siegen CFI Began in the Summer of 2005 Then
4 Katrina Katrina... 2/27/2009 4
5 Katrina Effects Construction Delayed for Several Months Influx of Temporary and Permanent Residents 24 Hour Counts Still +19% Over Pre CFI Volumes Peak Hour Counts Increased Erratically
6 Design Volumes (Projected 2004) Post Katrina Volumes (May 8, 2007) Free Airline Hwy % 20% Free Airline Hwy % 25% -14% Siegen Lane Sherwood Forrest Siegen Lane Sherwood Forrest % 16% -24% % 18% 12%
7 Opening
8 March 21, 2006 Opening Day
9
10
11
12 Operations
13 The Basics of CFI ABMB CFI.avi At-Grade Intersection Left-turns happen in advance of the main intersection Movements occur simultaneously This eliminates phases from the signal More capacity Less Congestion Intuitive to drivers (turn left to go left) Many possible configurations
14 CFI Efficiency Conventional 4-lane roadway 650 v/l/h x 4 lanes = 2600 v/h C=150 P.M. Peak
15 CFI Efficiency Conventional 4-lane roadway 650 v/l/h x 4 lanes = 2600 v/h C=150 P.M. Peak CFI 4-lane roadway 850 v/l/h x 4 lanes = 3400 v/h C=120 P.M. Peak
16 The Bad News Actual Volumes Much Higher Than Design Volumes Katrina Avoiders Returned to Intersection Unbalanced Increases Made Timing Adjustments Challenging The Good News Operations Greatly Improved Travel Times down 40% Average Delay Less than ½ Previous Driving Public Satisfaction Safety
17 Cumulative Accident Data: Twelve Month Period (March March)
18 Cumulative Accident Data: Six Month Period (March September)
19 Accident Data Four-Leg Signalized Four-Leg Signalized Four-Leg Signalized CFI CFI CFI March 21-September 21 March 21-September 21 March 21-September 21 March 22-September 21 March 21-September 21 March 21-September 21 Type of Collision Fatalitie Seriou PDO s s Injurie s Total Fatalitie Seriou s s Injurie s PDO Total Fatalitie Seriou PDO s s Injurie s Total Fatalitie Seriou s s Injurie s PDO Total Fatalitie Seriou PDO s s Injurie s Total Fatalitie s Rear End Merging/Diverging/Si de Swiping Crossing(Left Turn) Crossing (angle) Right Angle Right Turn Head On Total Seriou s Injurie s PDO Tota l Four-Leg Signalized Four-Leg Signalized Four-Leg Signalized CFI CFI CFI June 1-August 31 June 1-August 31 June 1-August 31 June 1-August 31 June 1-August 31 June 1-August 31 Type of Collision Fatalitie Seriou PDO s s Injurie s Total Fatalitie Seriou s s Injurie s PDO Total Fatalitie Seriou PDO s s Injurie s Total Fatalitie Seriou s s Injurie s PDO Total Fatalitie Seriou PDO s s Injurie s Total Fatalitie s Rear End Merging/Diverging/Si de Swiping Crossing(Left Turn) Crossing (angle) Right Angle Right Turn Head On Total Seriou s Injurie s PDO Tota l
20 Preliminary Safety Analysis Total Accidents Down 25% Serious Accidents Down 34%
21 Misconceptions Confusing to Drivers What if the Power Goes Out?
22 Public Acceptance
23 Day Before Opening
24 4 months later
25 The Advocate
26 The Advocate
27 Public Acceptance Survey
28 Public Acceptance Survey Question 3a: State below whether you think the improvements make TRAFFIC CONGESTION Better, Worse, or the Same Traffic Congestion Traffic Congestion % 10% % Better Wo rse Same 0 Better Worse Same
29 Public Acceptance Survey Question 5. Please indicate your level of satisfaction with the current traffic conditions of the intersection. Level of Satisfaction Level of Satisfaction % 6% 2% Extremely Satisfied 20% 59% Somewhat Satisfied Satisfied Unsatisfied Extremely Unsatisfied Extremely Satisfied Somewhat Satisfied Satisfied Unsatisfied Extremely Unsatisfied 92% Satisfied
30 LADOTD CFI Task Force Formed to evaluate this and future CFI s Comprised of key LADOTD department heads, FHWA, City, Law Enforcement and consultant The study looks at Operational Performance, Design Elements, Safety and Public Acceptance Final report coming soon (3 months +/ ) FHWA Unconventional Intersection Study Study will evaluate operational performance, safety and driver behavior for 3 unconventional intersections: 1. CFI Airline at Siegen, Baton Rouge, Louisiana, opened March CFI Bangerter at 3500 South, Salt Lake City Utah, construction starts early DDI Kansas City, Missouri
31 Where is CFI Today? Louisiana 1 Open, 8 studied or currently under study 1. Airline Highway at Siegen Lane (Open) 2. Airline Highway at Goodwood, Old Hammond, Bluebonnet, Jefferson 3. Florida Boulevard at Sherwood Forest Boulevard 4. Alexandria Traffic Circle 5. Ambassador Caffrey Parkway at Johnston Street 6. Statewide Study on going, All Districts (90+ Intersections) Maryland 1 operational, 6 studied or currently under study MD 228 at MD 210 (operational) 1. MD 140 Corridor Study 7 intersections / 3 CFI s 2. US 29 at Stewart Lane / Eden Lane 3. MD 140 at Painters Mill Road 4. MD 213 at US 40
32 Mississippi 1 Under Construction, 1 Under Design 1. US 61 at Junkin Drive (Under construction, 2010 Opening) 2. US 49 at State Route 53 (Final Plan Stage) 3. US 61 at Devereaux Road 4. Jackson at State Route 6 Ohio 2 under design, 5 studied or currently under study 1. Austin Pike at State Route 741 (Final Plan Stage) 2. Beachmont at 5 Mile (Preliminary Design) 3. Columbus Pike at Powell Road 4. Brice Road at Scarborough / Tussing Boulevard 5. State Route 32 at Glenestre 6. State Route 32 at Bells Lane 7. State Route 32 at Baur Road Utah 1 Open to Traffic Bangater Hwy at 3500 South Arkansas 1 studied Shackleford Highway at I 630 / Financial Center Parkway Statewide Study on going
33 Thank You
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