In the article titled “Safety Impacts of Push-Button and Countdown Timer on Nonmotorized Traffic at Intersections” [1], the vehicle crash data the authors used was used without the authorization from the Transportation Engineering Laboratory (TE Lab) at Illinois Institute of Technology. Accordingly, an acknowledgment should be added:
The authors would like to thank Dr. Zongzhi Li, the faculty Director of Transportation Engineering Laboratory (TE Lab) at Illinois Institute of Technology, Chicago, USA, for collecting the crash data used in the article.