📖 ABSTRACT/OVERVIEW
Secondary school completion rates in North West Nigeria remain among the lowest in the country, with spatial inaccessibility to schools constituting a documented barrier alongside poverty and social norms. This study models spatial accessibility to public secondary schools in Kebbi State using GIS-based transportation network analysis, filling a gap in empirically grounded accessibility evidence for North West Nigerian educational planning. GPS coordinates of all 312 public secondary schools in Kebbi State are collected through field surveys and cross-referenced against the Kebbi State Universal Basic Education Board register. A routable road network is constructed from OpenStreetMap data, updated through GPS surveys in underserved areas, incorporating road classification and surface quality attributes to derive realistic travel speed assumptions. The Enhanced Two-Step Floating Catchment Area method is applied to compute accessibility indices for each 5-kilometre enumeration grid cell, incorporating both supply capacity (school enrolment space) and demand (secondary school-age population). Results identify severe accessibility deficits in the Yauri, Ngaski, and Danko-Wasagu LGAs, where over 40 percent of secondary school-age children live more than thirty minutes from any public secondary school by road. Multiple regression analysis identifies road network density and LGA poverty rate as the strongest predictors of accessibility variation. The study informs the Kebbi State Ministry of Education's capital development plan and the Universal Basic Education Commission's equity grant allocation formula. Keywords: spatial accessibility, secondary education, Kebbi State, two-step floating catchment, GIS.
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