In Ethiopia it is common problem to observe time performance problem in almost all roadrnconstruction projects either completed in the previous years or currently progressing and thernsituations are still showing little or no improvements.rnThe factors that result in poor time performance has been dealt by different professional,rnresearchers largely on the magnitude of their effect of various nation construction projects. Thernaim of this thesis is to identify and evaluate the main factors affecting the time performance ofrnroad construction projects particularly on new and upgrading projects which have been executedrnor being progressing under Ethiopian Roads Authority by local contractors. In the literaturernreview part of this research factors affecting the time performance have been identified and localrnfactors have been added from local expertsâ€™ recommendations through an interview. About 22rncompleted and/or on progress under the ERA, RSDP III and IV were sampled for analysis ofrntheir time performance with the identified causing factors. A questionnaire survey was conductedrnon the identified factors under major groups of planning, management, financial, technical,rnmaterial equipment and labor for the sampled projects. In addition, a case study has beenrnconducted on selected four projects to identify factors that affect the time performance on thernspecific cases.rnAs per the weighted rank of the respondent, financial related problems, improper utilization ofrnadvance payment followed by financial constraint for construction material and spare parts havernbeen agreed as very important factors that affect the time performance. Through the course of therncase study respondents have suggested that ERA shall assist in financing the project with settingrnrules and regulation to tackle the improper advance payment utilization. In line with this thernresearcher has learnt that ERA, the client pre-financed projects under the case study by takingrninto account the seriousness of the issue. On the other hand, poor management which isrnmanifested as unrealistic resource allocation in the planning period and poor site coordination ofrnavailable resource during the construction period was ranked as the preceding factor.rnFinally, selected respondents have been interviewed for their recommendation to curb the rankedrnfactors and to minimize their effect for the upcoming projects.