Natural gas is transported through the natural gas distribution network through regional and local gas pipeline networks from the gas receiving point on the transmission system to the gas users. In Slovenia, there is a gas distribution pipeline network in 85 municipalities, which are operated by local operators of the natural gas distribution system. Due to the growing concern for a healthy and clean environment, the use of natural gas in transport is increasing significantly. Today, apart from hydrogen, natural gas is the cleanest alternative fuel for propulsion and heating. Carbon dioxide CO 2 emissions in transport represent almost a quarter of all global emissions.