Several Algerian cities are increasingly experiencing notable traffic congestion due to the unequal distribution of urban functions. This research specifically analyses and assesses the urban functions planning’s impacts on transportation in Béjaïa city, as well as the consequences of the traffic generated on the environment and citizens’ life quality. For such objectives, the study analyzed the distribution of trip-generating activities, the adequacy of their planning with the urban transport network, and the inhabitants’ perceptions regarding the environment and life quality. To this end, the study employed a mixed-methods approach for data collection and analysis. This methodology includes qualitative field observations and quantitative data collected through questionnaire surveys. The results indicated a significant correlation between the urban functions’ planning and the generated traffic flows. The zoning observed in Béjaïa generates a disconnection between origin and destination, leading to longer distances traveled and a deteriorated environment. Indeed, around 80% of the respondents expressed dissatisfaction with the location of Béjaïa’s urban functions and life quality. Thus, it is recommended to revise zoning regulations, reevaluate industrial zones, improve the mobility plan sustainably, and promote community participation in the urban planning process. These research findings serve as a reference for researchers and decision-makers to enhance future urban planning in Béjaïa and other cities around the world.