The Regional Transportation District intends to end an agreement with Greyhound that allows the intercity bus service to use the underground bus concourse at Union Station. RTD said issues including loitering and buses abandoned overnight "have negatively contributed to RTD's operations," leading them to terminate the five-year agreement when it ends on Aug. 31. "Over the past four years, on multiple occasions, Greyhound has abandoned buses and its customers in the bus concourse overnight," RTD said in a statement. "Greyhound's operations also necessitate long waits for transferring passengers, which causes crowding and loitering around Greyhound gates in the concourse. These issues have negatively contributed to RTD's operations and made it more difficult for Transit Police and contracted security personnel to effectively patrol and secure the facility." "RTD recognizes that Greyhound has made good faith efforts to address many of the agency’s concerns related to personal safety and security challenges, but it is in RTD’s best interest not to renew the agreement," the statement said. RTD and Greyhound entered into the agreement in August 2020. Greyhound previously operated from a standalone facility at 19th and Curtis streets in downtown Denver. In March 2022, RTD announced they would make changes to address "unwelcome activity" at the bus concourse. The moves came after transit workers and others expressed concerns about illegal activity and unsafe conditions in the area. RTD said that last year, the agency "redoubled its efforts to create a welcoming transit environment for all bus and rail customers, with a specific focus on bolstering security at Denver Union Station." "RTD recognizes that Greyhound has made good faith efforts to address many of the agency’s concerns related to personal safety and security challenges, but it is in RTD’s best interest not to renew the agreement," the agency said in the statement. 9NEWS reached out to Greyhound via email for comment. We'll update this story when we hear back.