Transport enterprises produce emissions during their activity, which is how they contribute to the polluting of the environment. The requirement of sustainability should therefore be incorporated into their concept of human capital management as well. The aim of this article is to point out the possibilities of application of various human capital management approaches leading to the requirement of increasing the efficiency, performance, competitiveness and sustainability of a transport enterprise in conditions of the Slovak Republic. Via the survey conducted in Slovak enterprises, we found out that the enterprises do not use human capital management much because they have only little knowledge about this concept of work with human capital. Based on the studying of professional literature, the results from the survey, and own experience, we designed two approaches for better implementation of human capital management leading to the increase of efficiency, performance and sustainability of enterprises operating in the field of public transport. The first one is the increase of human capital value via training, and the second consists of the metrics for the assessment of how effectively the enterprises use human capital. We have verified the application of the metrics in conditions of a concrete particular enterprise.