|Project Name:||Development of the Capacity Analysis for Planning of Junctions Tool (CAP-X)|
|Contact:||Last Name: Lochrane |
First Name: Taylor
|Organization:||Federal Highway Administration - Turner-Fairbank Highway Research Center (TFHRC)|
Office of Operations Research and Development |
Trans Ops Concepts and Analysis Team |
|Project Description:||The project will develop a new tool that advances the Alternative Intersections Selection Tool (AIST) to include a new interface, front and back printing for each design worksheet, computer-aided design (CAD) drawn designs, and shared lanes configurations for the conventional intersection. There are three additions that improved from the AIST: (1) The addition of interchanges include diamond, partial cloverleaf, displaced left turn double crossover diamond, and single point. (2) The addition of one lane by two lane and two lane by one lane roundabout configurations with the 2010 Highway Capacity Manual (HCM) capacity equations.(3) The addition of the mini-roundabout model for 50-foot and 75-foot inscribed circle diameter designs.|
Saxton Transportation Operations Laboratory|
|Start Date:||March 7, 2011|
|End Date:||March 30, 2012|
|FHWA Program Name:||Other|
The key project objectives are:
(1) Upgrade the interface and improve the use of the tool.
(2) Add new innovative interchanges and roundabout designs.
(3) Release the tool.
|Background Information:||Data not yet available|
|Test Methodology:||Critical volumes calculated in Excel.|
|Other Information:||Data not yet available|
|More Information URL(s):|
|Fieldtest:||Data not yet available|
|Expected Benefits:||The expected benefit is a tool that will help traffic planners evaluate innovative intersection designs.|
Name: Capacity Analysis for Planning of Junctions (CAP-X)|
Product Type(s): Software
Description: The new version will include roundabouts and new innovative interchanges.
Audiences: Researchers, State highway agencies, Academics, City and county agencies, Other highway agencies, Operations researchers, Traffic engineers, Safety planners, Safety researchers, State departments of transportation
Secondary Audiences: , Design engineers
|Project Findings:||Data not yet available|
Research/Technologies--Turner-Fairbank Highway Research Center (TFHRC)|
Types of Intersections
Highway Traffic Control
Planning and Forecasting|
Operations and Traffic Management