Abstract <p>Dumpsites constitute hazards when unmanaged. Roads leading to these sites, like those at Ojota, Lagos, are known to be littered with waste carried by trucks to the dumpsites, and many of such roads are mini dumpsites due to indiscriminate disposal of waste by the public. The exposure of the users of the road network of the dumpsites at Ojota, Lagos State to ionizing radiation has been investigated. Ambient dose rates were measured using the RADS-30 survey meter. Radiation dose-risk software was used to predict the cumulative doses of users of road networks for 5 years. Radiometric analysis of 20 soil samples was conducted in the Radiation Laboratory using a sodium iodide detector. The results show that the mean values for the ambient dose rates were 320–450 μSv/h, and the mean values for the predicted cumulative dose were 3.87–5.45 mSv. The activity concentrations of ²²⁶Ra, ²³²Th, and ⁴⁰K were in the ranges 16.6–113.8, 229–518, and 107–497 Bq/kg, and their corresponding mean values are 57.4, 372, and 296 Bq/kg, respectively. The estimated absorbed dose rates and the annual dose rates for the study ranged from 210 to 340 nGy/h with a mean of 260 nGy/h and from 110 to 210 μSv/year with a mean of 154 μSv/year, respectively. Almost all the estimated radiological parameters are greater than the world average; therefore, a continuous radiological survey of not only the road network but also the dumpsite is strongly recommended.</p>