The Federal Aviation Administration (FAA) is using the Airport Landside Planning Simulation (ALPS ), EMME/2, and TRAFFIX models to support the planning and environmental analyses of the O’Hare Modernization Environmental Impact Statement.

ALPS is an airport-planning tool used to assess the effect of demand and operational changes on the airport system (evaluating terminal passenger flow and terminal curbside roadway systems). The modeling is being done by Kimley-Horn and Associates, Inc., a City of Chicago contractor, at the direction and oversight of the FAA. ALPS is a commercially available model developed and maintained by Kimley-Horn and Associates, Inc. (http://www.kimley-horn.com/kha/disciplines.asp?MenuID=126).

EMME/2  is used for demand modeling, network analysis, and evaluation of the transport of people in urban, metropolitan, and regional transportation systems. The modeling is being done by Kimley-Horn and Associates, Inc., a City of Chicago contractor, at the direction and oversight of the FAA. EMME/2  is a commercially available model developed and maintained by INRO Consultants, Inc. (http://www.inro.ca/englindex.html). EMME/2  databanks and documentation for background trips were obtained from the Chicago Area Transportation Study (http://www.catsmpo.com)

TRAFFIX  is an interactive computer simulation model that is being used to calculate level of service (LOS) for both baseline and future (with project) scenarios at signalized and unsignalized intersections and on urban and suburban arterials. The modeling is being done by Kimley-Horn and Associates, Inc., a City of Chicago contractor, at the direction and oversight of the FAA. TRAFFIX  is a commercially available model developed and maintained by Dowling Associates, Inc. (http://www.dowlinginc.com/).

As this data becomes available in draft final form, the FAA will post the various components of each analysis including the traffic study methodology, project files, and modeling results used in the preparation of the EIS. However, please be advised that this data continues to be reviewed by the FAA and may change. Due to licensing agreements, the ALPS , EMME/2 , and TRAFFIX  models are not available on this website.

For each scenario year, the following directories will be available:

1. Airport Trips
2. Background Trips
3. Cargo Trips
4. Employee Trips
5. TRAFFIX
6. GIS Files
7. Results

| Methodology Summary | | Baseline 2002 | | 2007 No Action |
| 2007 With Project | | 2009 No Action | | 2009 With Project | | 2013 No Action |
| 2013 With Project | | 2018 No Action | | 2018 With Project |
 

 If you have any problems accessing any of the information presented on this website, please e-mail cmp@faa