Abstract: This study was carried out to assess the determinants of durability of road networks in the rural setting of Ugunja Sub-County in Kenya. This study was anchored by the constraint theory. The target population of the study was 120 employees of Kenya rural road authority, 180 road side residents, and chiefs in Ugunja Sub- County. A sample size of 94 respondents was studied from which comprised of 36 officials of KeRRA, 54 roadside residents and 4 chiefs. Purposive sampling was used to identify the respondents. Questionnaires and interview guides were employed for data collection. Analysis of study variables to answer the research questions were conducted using descriptive statistics of frequency tables, charts, graphs and percentages. Quantitative data was analysed using statistical packages for social sciences. The SPSS was used because it is effective. The study found out that funding, political interference, contract time and human activities greatly influence the durability of rural roads network in Ugunja. The study therefore concluded that a lot need to be done around the cited areas. The study therefore recommended that all stakeholders needs to play their roles in ensuring that the roads remain durable after construction.