Montgomery County's Ride-On bus system has added service between Gaithersburg and Shady Grove Adventist Hospital.

Buses leave Lakeforest Mall in Gaithersburg about every half hour Monday through Friday, beginning at 6:15 a.m. Return trips from the hospital start at 6:45 a.m. and continue every half hour until 6:55 p.m.

Twenty-four stops at major intersections and places of employment between the mall and the hospital are marked by blue-and-white signs.

Saturday service begins at 8:45 a.m. from the hospital and the mall. Trips are made every half hour, ending at 5:45 p.m. A slightly different route will be taken Saturdays because the National Bureau of Standards building and grounds are closed weekends.

No Sunday service is available.

Fares for the Ride-On service are 50 cents, plus a 10-cent transfer charge. Reduced rates of 30 cents and a five-cent transfer charge, with a special Metro identification card, are available for senior citizens at any county library and for handicapped people by calling the Metro office at 637-1245.

More information on the new route is available by calling 251-2225 between 7:30 a.m. and 5 p.m. Monday through Friday.