Two-dimensional Electrical Resistivity Tomography was done on failed portions of Southsouth Benin – Akure Expressway, in Ovia Northeast LGA, to establish the subsurface geological formations responsible for the pavement failure and provide geotechnical support for its maintenance. The survey was done on five worrisome portions of the highway, namely; Igbekhwoe, Odighi, Odiguetue, Omigie and Ugboke communities respectively, using Wenner array electrode configuration to obtain one profiles of 100 m length on both sides of the road at each location. The instrument used was ABEM Terrameter SAS 1000. The apparent resistivity data were acquired, processed and inverted using RES2DINV software producing 2D models of the subsurface of survey locations. These models revealed the resistivity variations ranging from (30.1-7089) Ωm with total depth of 19.8 m. The investigation revealed that the reasons for the pavement failure on the highway studied were the presence of near surface clay soil, sandy clay soil/ clayey sand and shale formation, having resistivity varying from (30.1- 100) Ωm. It was recommended that regular monitoring and maintenance of this road by relevant agencies by excavating these subgrade soil and replacing it with well compacted lateritic soil, and gravel will reduce the effect of regular collapse these spots on this highway.