This study examines the causes of traffic congestion in the central business district of Onitsha, Anambra State. It evaluates the opinion of commuters, transport operators and private car owners on the factors responsible for their experience of traffic congestion in the study area. A total of 158 responses through questionnaire survey of the respondents were collected for analysis. The population was sampled using simple random sampling. The study employed multiple linear regressions to determine the extent of the contribution of the factors responsible for traffic congestion in the Onitsha central business district (CBD).The result of the study showed that traffic congestion within the CBD of Onitsha is significant and will increase by 36.4% for every additional score on poor road network and planning. This indicates that the nature of the road network in Onitsha contributes a major cause to traffic congestion. The study recommends the need to extend, reconstruct and expand existing roads within the CBD to link adjacent and opposite districts as the means to reduce traffic congestion in the area.
Key Words: Traffic Congestion, Central Business District, Commercial activities, Poor road network