The Economic Cost of Traffic Congestion in Owerri Metropolis: A Productivity Loss Assessment

Traffic congestion in Nigerian urban centers imposes substantial economic costs through productivity losses, fuel waste, elevated emission externalities, and logistical disruptions that depress business efficiency and worker performance. This study assesses the economic cost of traffic congestion in Owerri metropolis, Imo State, with particular focus on productivity losses incurred by workers and businesses during the period 2021 to 2024. The study is anchored on the Theory of Time Value and Opportunity Cost, which frames time lost in traffic as foregone productive economic activity with measurable monetary equivalents. A cross-sectional survey research design was adopted, targeting commuters and business operators in Owerri. From an estimated population of 50,000 daily commuters, a sample of 385 respondents was selected using stratified random sampling. Structured questionnaires and traffic flow data from the Imo State Ministry of Works were the primary instruments. Findings reveal that the average Owerri commuter loses approximately 1.8 working hours per day to traffic delays, translating into an estimated annual productivity loss of over 4.2 billion naira at prevailing wage rates. Fuel cost escalation from idling vehicles and increased vehicle wear were identified as secondary cost components of congestion. The study concludes that traffic congestion constitutes a quantifiable drag on economic productivity in Owerri. It is recommended that Imo State government invest urgently in road network expansion, traffic signal automation, and mass transit alternatives to reduce the economic burden of congestion in the metropolis.

Keywords: Traffic congestion, productivity loss, time value, Owerri, urban economics