Who is the operator of Star Tollway?

Can you tell me, who exactly is the operator of Star Tollway? I'm interested in knowing the background and credentials of the company that runs this tollway system. Is it a private entity, a government-owned organization, or perhaps a consortium of multiple stakeholders? I'd also like to know if there have been any notable changes in ownership or management over the years. It would be great if you could provide me with some more information on this topic.