About the Authors
- Kai Wang
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Contributed equally to this work with: Kai Wang, David M. Levinson
Affiliation Beijing Key Laboratory of Traffic Engineering, Beijing University of Technology, Beijing, China 100124
- David M. Levinson
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Contributed equally to this work with: Kai Wang, David M. Levinson
* E-mail: dlevinson@umn.edu
Affiliation Department of Civil, Environmental, and Geo- Engineering, 500 Pillsbury Drive SE, Minneapolis, MN 55455, United States of America
Competing Interests
The authors have declared that no competing interests exist.
Author Contributions
Conceived and designed the experiments: DML KW. Performed the experiments: KW. Analyzed the data: DML KW. Wrote the paper: DML KW.