Journal of Transportation Technologies, 2023, 13, 615-631 https://www.scirp.org/journal/jtts ISSN Online: 2160-0481 ISSN Print: 2160-0473 DOI: 10.4236/jtts.2023.134027 Sep. 20, 2023 615 Journal of Transportation Technologies Traffic Flow Characteristics in Work Zone and Non-Work Zone Environment and Its Impact on Road Crashes at the Segment Level Dorcas O. Okaidjah, Christopher M. Day Abstract Keywords 1. Introduction