MZK, or the Międzygminny Związek Komunikacyjny, is a dynamic organization headquartered in Jastrzębie-Zdrój, dedicated to optimizing urban transport communication across several municipalities. It focuses on integrating public transportation services, facilitating seamless travel for passengers in the areas belonging to the Union. MZK offers a wide array of services, including a user-friendly online bus schedule, electronic ticketing options, and a dedicated app for mobile ticket purchases.

The Jastrzębianina Card is specifically designed for children, students, and seniors, offering discounted fares to promote accessibility. Furthermore, MZK enhances passenger information through an SMS notification system to keep users updated on service changes and disruptions. With a commitment to continuous improvement, MZK is involved in various EU-funded projects aimed at modernizing public transport infrastructure. For passengers looking for efficient and reliable transportation solutions, MZK is an essential service provider within the region, offering comprehensive support that caters to the community's needs.