Author

Achemie Lewis Oba

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Review Open access Sep 2026

CAPACITY AND LEVEL-OF-SERVICE ASSESSMENT OF RUMUOKORO ROUNDABOUT IN THE CITY OF PORT HARCOURT UNDER MIXED TRAFFIC

Rapid motorisation and uncoordinated land-use growth along arterial corridors in Port Harcourt, Nigeria, have overloaded many at-grade junctions, including roundabouts originally designed for far lower demand. This study evaluated the operational performance of the five-leg Rumuokoro Roundabout, a key node linking the...

Abiye Godwill Major Jack, Achemie Lewis Oba · International Journal of Sci... · 0 citations

Open access Sep 2026

Assessment of Drivers’ Behaviours and Near-Miss Occurrences at Unsignalized Intersections in Port Harcourt: A Chi-Square Analysis

Road traffic crashes remain a leading cause of death and injury in developing countries, and unsignalized intersections are recognised as high-risk locations where competing traffic streams cross without signal control. In Port Harcourt, Nigeria, weak enforcement and mixed traffic conditions make driver behaviour a cri...

Emmanuel Ihuoma Mike-Ogburia, Achemie Lewis Oba · Open Access Research Journal... · 0 citations