Study Details
Study Title: Diverging Diamond Interchange Performance Evaluation (I-44 & Route 13)
Authors: Chilukuri et al.
Publication Date:FEB, 2011
Abstract: Performance evaluation was conducted on the first "diverging diamond interchange (DDI)" or "double crossover interchange (DCD)" constructed in the United States. This evaluation assessed traffic operations, safety and public perceptions to determine the changes between the previous standard diamond interchange and the new DDI/DCD.
Study Citation: Chilukuri, V., Siromaskul, S., Trueblood, M., and Ryan, T. "Diverging Diamond Interchange Performance Evaluation (I-44 & Route 13)." HDR Engineering, St. Louis, MO. (2011).
Study Report: Download the Study Report Document
CMFs Associated With This Study
Category: Interchange design
Countermeasure: Convert diamond interchange to Diverging Diamond Interchange (DDI) or Double Crossover Diamond (DCD)
| CMF | CRF(%) | Quality | Crash Type | Crash Severity | Roadway Type | Area Type |
|---|---|---|---|---|---|---|
| 0.54 | 46 |  | All | All | Principal Arterial Interstate | Urban |
| 0.28 | 72 | | All | B | Principal Arterial Interstate | Urban |
| 0.63 | 37 | | All | O | Principal Arterial Interstate | Urban |
| 0.71 | 29 | | Rear end | All | Principal Arterial Interstate | Urban |
| 0 | 100 | | Left turn | All | Principal Arterial Interstate | Urban |
| 0.81 | 19 | | Not specified | All | Principal Arterial Interstate | Urban |
