Abstract:
This study investigates the performance of junction through road user crossing behavior and the influence of road geometry on this behavior at selected junctions within Kigali City, Rwanda. The primary objectives were to assess existing road user crossing behaviors, establish the relationship between road geometric features and these behaviors, and ultimately evaluate the performance of the observed junctions.
The methodology involved [e.g., direct observation of road user movements, collection of geometric data, and qualitative assessment]. Key geometric parameters considered included the presence of traffic lights, medians (traffic islands), and lane widths, all of which are critical elements in urban intersection design. The study collected data on a diverse range of road users, encompassing pedestrians, cyclists, motorcyclists, and various vehicle types, reflecting the typical traffic composition in Kigali.
Study showed that for Behavioral Compliance, Giporoso Junction achieved near-perfect scores (20/20) due to high signal adherence (96.3% pedestrian compliance), while Nyabugogo (18.25/20) showed gaps in motorcyclist discipline (16.3% illegal overtaking)
Findings revealed that road geometry significantly impacts road user behavior. For instance, signalized intersections generally contributed to more structured crossing patterns, while the inclusion of medians provided crucial safe refuge areas for pedestrians, enhancing their safety during crossings. Lane width also played a role in influencing vehicle speeds and the perceived safety environment for vulnerable road users. Regression models confirmed traffic control (R² = 0.986) as the dominant factor over geometry. The study underscores the need for integrated design and enforcement to mitigate conflicts in rapidly urbanizing contexts.
In conclusion, effective road geometric design, complemented by appropriate traffic control and management strategies, is paramount for improving road safety and optimizing junction performance in urban environments like Kigali. The study offers valuable insights for urban planners and traffic engineers seeking to enhance pedestrian safety, reduce conflicts, and improve the overall efficiency of road networks.
