Evaluating Citizens’ Satisfaction and the Impacts of Dedicated Motorcycle Lanes on Urban Quality of Life: A Case Study of Central Tehran

High traffic congestion in the Tehran metropolis and its consequences, such as longer travel times, reduced safety, and a decline in urban quality of life, underscore the need for travel-demand and traffic-management strategies. Within this context, dedicated motorcycle corridors, as an integrated infrastructure–management measure, may contribute to reducing traffic conflicts and improving network efficiency. This study aimed to evaluate the effects of implementing dedicated motorcycle lanes on urban quality of life and citizens’ satisfaction within Tehran’s traffic-restricted zone. The study population comprised three groups: motorcycle riders and passengers; residents, pedestrians, and local shopkeepers; and urban-transport experts and practitioners. Data were collected through a structured questionnaire and analyzed using descriptive and inferential statistical methods in SPSS. Service quality gaps were additionally assessed using the SERVQUAL model. The findings indicate that, from respondents’ perspectives, dedicated motorcycle lanes can improve traffic flow, reduce travel time, and enhance the predictability of movement, thereby being associated—at the perceptual level—with higher satisfaction regarding urban trips. Nevertheless, the results also reveal significant challenges related to operational safety, compliance with traffic regulations, and driving culture, suggesting that without strengthened enforcement, education, and behavioral traffic management, a portion of the expected benefits may be constrained. The SERVQUAL analysis further shows that dimensions related to responsiveness and understanding citizens’ needs exhibit larger gaps between the current and the desired conditions.