Frequent accidents in construction projects are due to the lack of special attention to SMKK. So it is necessary to analyze the dominant factors that influence the implementation of SMKK. In addition, it is necessary to conduct a study on the implementation of the construction safety management system in the implementation of road projects by contractors. For this purpose, primary data was collected in the form of questionnaire results sourced from the Regulation of the Minister of Public Works and Public Housing of the Republic of Indonesia Number 21/PRT/M/2019 and observations on the implementation of SMKK by contractors. The secondary data are in the form of project RKK documents and other documents needed in this research. The method used in the analysis is the Relative Importance Index (RII) analysis method on the questionnaire data obtained. From the research, it is known that occupational safety and health and public safety are the dominant factors in the implementation of the construction safety management system. There are observations on the implementation and implementation of the contractor on the implementation of the Regulation of the Minister of Public Works and Public Housing of the Republic of Indonesia Number 21/PRT/M/2019 and observations on the Project Construction Safety Plan to review whether the results of the questionnaire are in accordance with the observations made. It is known that in general the contractors have implemented the SMKK well. The strategy for improving SMKK is based on the dominant factors that have been known from the research. The key word in the safety improvement strategy is regular coordination, monitoring, and evaluation by relevant parties such as owners, contractors, and supervisory consultants. This can be done during routine meetings by attaching documentation of the implementation of the SMKK in the form of a Construction Safety SOP, a checklist form and photos of the implementation of the SMKK. With the implementation of this, it is hoped that it can prevent or

Keywords : SMKK, RII, SMKK Improvement Strategy.