Identifying Demographical Effects on Speed Patterns in Work Zones Using Smartphone Based Audio Warning Message System

Fengxiang Qiao^*, Ruksana Rahman, Qing Li and Lei Yu

Innovative Transportation Research Institute, Texas Southern University, Houston, TX 77004, USA

^*Corresponding Author: Fengxiang Qiao, Innovative Transportation Research Institute, Texas Southern University, Houston, TX 77004, USA, Tel: 713-313-1915 Email: