link trains generally run seven days a week at frequencies of 6 to 24 minutes, with stops spaced closely together. most stations offer connections to nearby buses or a park and ride facility. the system is planned to expand to over 70 stations and by 2041, with five lines serving all three counties. red line trains are operated and maintained under contract with king county metro and are able to carry more passengers, serving as the regional rapid transit system. orange line trains are akin to streetcars, unable to be coupled into pairs, and are operated and maintained by sound transit staff (the only service in the system to not have operations and maintenance performed under contract).