Communication among organizations could play an important role in increasing road safety. To get in-depth knowledge of its role, this study measured managers' and employees' perceptions of the communication's role on six safety management and performance criteria for road safety practices by conducting a survey using a questionnaire among 165 employees and 135 managers. Path analysis using AMOS-19 software shows that some of the safety management road safety practices have high correlation with the safety performance, namely, from the six antecedents, only the safety training and safety promotion, closely correlate with the safety motivation, and only safety commitment, safety communication and feedback have close relations with the safety knowledge and safety behavior compliance, and only safety feedback has effective relations with the safety participation. Safety feedback is identified as the most important safety management issue to road safety practices and it would predict the level of safety knowledge, safety motivation, safety compliance and safety participation. The results of this study would help the concerned agencies/orgaizations in improving their ability to assess the road safety indicators and to the future development of the safety performance management for road safety practices in these agencies.