Date of Award


Document Type


Degree Name

Doctor of Philosophy (PhD)


Environmental Engineering

First Advisor

Michael Mann


This dissertation focuses on how technology has transformed road traffic congestion between road users by examining the relationship between government, businesses, and road users through the application of traffic management in many cities in four regions of the world. It analyzes the connections between political decisions of traffic management, how users are made knowledgeable and the new modes of transportation as they relate to the roles of public and private users. The dissertation examines current literatures of twenty two (23) different countries: North America (United States of America and Canada), Europe (Poland, United Kingdom, Italy, Netherlands and Sweden), Asia (Russia, China, Singapore, Hongkong, United Arab Emirates, Israel, South Korea, Japan, India), and West Africa (Ghana, Senegal, Sierra Leone, Mali, Cote D’Ivoire, Nigeria) as they relate to trends and causes of congestion and mitigation applied in each country. Finally, this dissertation takes an in depth look at how road network can be improved through mitigation to reduce congestion in Nigeria; most specifically in Ibadan focusing on the intersection of Sango Eleyele Road and Sango Ojoo Road representing most of the major intersections in Ibadan, Oyo State Nigeria.