A Transportation System Performance and Safety Analysis of Juba, South Sudan

This study presents a comprehensive analysis of the transportation system in Juba, South Sudan, examining traffic flows, infrastructure capacity, and road safety at critical urban intersections. This research reveals significant challenges in urban mobility and safety through systematic data collection and analysis of traffic patterns at major intersections including Gudele Road at Rock City Road, University of Juba Roundabout, Custom Roundabout, and Seventh Day Roundabout. The study finds severe capacity constraints with volume-to-capacity ratios exceeding 1.6 during peak hours at major intersections, while safety analysis indicates concerning crash patterns with motorbikes involved in 54.6% of all traffic movements yet representing the highest risk category. Annual crash data shows 113 recorded incidents with a 77.8% injury rate, concentrated among drivers aged 26–35 years. The research contextualizes these findings within the broader East African transport landscape and South Sudan's post-conflict infrastructure development trajectory. Key recommendations include immediate traffic signal implementation, dedicated motorcycle infrastructure, enhanced enforcement mechanisms, and comprehensive road safety education programs targeting high-risk demographics.