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

CFI Efficiency 650 Conventional 4-lane roadway 650 v/l/h x 4 lanes = 2600 v/h C=150 P.M. Peak

CFI Efficiency Conventional 4-lane roadway 650 v/l/h x 4 lanes = 2600 v/h C=150 P.M. Peak 650 CFI 4-lane roadway 850 v/l/h x 4 lanes = 3400 v/h C=120 P.M. Peak 850

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

More History  LADOTD and ABMB Began Discussing Possible CFI Applications  Construction of the Airline / Siegen CFI Began in the Summer of 2005  Then …

Katrina… 9/19/20157 Katrina...

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

Design Volumes (Projected 2004) Post – Katrina Volumes (May 8, 2007) Free Free Airline Hwy. Siegen LaneSherwood Forrest Airline Hwy. Siegen LaneSherwood Forrest -42% 16% -24% 17% 20% -3% 18% 12% 82% 25% -14%

March 21, 2006 – Opening Day

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

Cumulative Accident Data: Twelve Month Period (March-March)

Cumulative Accident Data: Six Month Period (March-September)

Preliminary Safety Analysis Total Accidents Down 25% Serious Accidents Down 34%

Misconceptions  Confusing to Drivers  What if the Power Goes Out?

Public Acceptance

Day Before Opening

4 months later

The Advocate

225 Magazine June 2007

The Advocate

Public Acceptance Survey

Question 3a: State below whether you think the improvements make TRAFFIC CONGESTION Better, Worse, or the Same…

Public Acceptance Survey Question 5. Please indicate your level of satisfaction with the current traffic conditions of the intersection. 92% Satisfied

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

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

 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 – 1 Under Construction, 1 Under Design, 5 studied or currently under study 1. Austin Pike at State Route 741 (Under Construction) 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

Questions Laurence Lambert, P.E., PTOE

Opening

Accident Data Four-Leg Signalized CFI March 21-September 21 March 22-September 21March 21-September 21 Type of Collision Fatalitie s Seriou s Injurie s PDOTotalFatalitie s Seriou s Injurie s PDOTotalFatalitie s Seriou s Injurie s PDOTotalFatalitie s Seriou s Injurie s PDOTotalFatalitie s Seriou s Injurie s PDOTotalFatalitie s Seriou s Injurie s PDOTota l Rear End Merging/Diverging/Si de Swiping Crossing(Left Turn) Crossing (angle) Right Angle Right Turn Head On Total Four-Leg Signalized CFI June 1-August 31 Type of Collision Fatalitie s Seriou s Injurie s PDOTotalFatalitie s Seriou s Injurie s PDOTotalFatalitie s Seriou s Injurie s PDOTotalFatalitie s Seriou s Injurie s PDOTotalFatalitie s Seriou s Injurie s PDOTotalFatalitie s Seriou s Injurie s PDOTota l Rear End Merging/Diverging/Si de Swiping Crossing(Left Turn) Crossing (angle) Right Angle Right Turn Head On Total

Operations