Beginning Sunday, a number of changes will be implemented in the Metrobus service in the Maryland suburbs, the Washington Metropolitan Area Transit Authority announced this month.

For detailed information regarding these or other schedule changes, passengers may call Metrobus Information at 637-7000.

Fliers detailing specific service changes should be available in the buses.

Following is a listing of adjusted routes.

Twinbrook-Silver Spring Line, Route C7

Weekday operating times will be revised. Trip times will be adjusted, but the number of scheduled trips operated will not change.

Aspen Hill Road-Montgomery Mall Line, Route C8

Saturday operating times will be revised. Trip times will be adjusted, but the number of scheduled trips will not change.

Eastover-Marlow Heights Line, Route D12 Only

Weekday operating times will be revised. Trip times will be adjusted, but the number of scheduled trips operated will not change.

Bethesda-Silver Spring Line, Route J2

Saturday and Sunday operating times will be revised. Trip times will be adjusted. On Saturdays, the 7 a.m. J2 trip from Silver Spring will be eliminated and J2 trips at 6:50 a.m. and 7:05 a.m. from Silver Spring will be added. On Saturdays, the 4:15 p.m. J2 trip from Montgomery Mall will be eliminated and J2 trips at 4:05 p.m. and 4:25 p.m. from Montgomery Mall will be added.

New Hampshire Avenue-Maryland Line, Route K6

Sunday operating times will be revised. Trip times will be adjusted, but the number of scheduled trips operated will not change.

Connecticut Avenue-Aspen Hill Line, Route L8

Evening rush-hour trip times will be adjusted. The 4:53 p.m. trip from Friendship Heights and the 5:40 p.m. trip from Aspen Hill will be eliminated.

Veirs Mill Road Line, Route Q2

Operating times will be revised on weekdays, Saturdays and Sundays. Trip times will be adjusted. On weekdays, a 4:53 a.m. trip will be added from Rockville to Silver Spring. On Saturdays, a 5:06 a.m. trip will be added from Silver Spring and a 5:46 a.m. trip from Montgomery College.

Queens Chapel Road Line, Routes R2, 4, 6, 7

Weekday operating times will be revised. Trip times will be adjusted, but the number of scheduled trips operated will not change.

River Road Line, Route T2

Operating times will be revised on weekdays. On Saturdays, a 6:15 a.m. trip will be added from Friendship Heights and a 7 a.m. trip will be added from Rockville.

Bethesda-Rockville Line, Route T6

On weekdays, buses will leave Montgomery College at 5:02 a.m., 5:26 a.m., 5:43 a.m., 5:58 a.m., 6:13 a.m., follow the present schedule until 4:38 p.m., then change to 4:50 p.m., 5:02 p.m., 5:14 p.m., 5:24 p.m., 5:44 p.m., 6:04 p.m., 6:24 p.m., 6:44 p.m., 7:06 p.m., 7:31 p.m. and back to current frequency. Buses will leave Friendship Heights on the present schedule until 5:30 p.m., then leave at 5:42 p.m., 5:54 p.m., 6:06 p.m., 6:18 p.m., 6:30 p.m., 6:50 p.m., 7:10 p.m., 7:35 p.m., and then revert to the current schedule. On Saturdays and Sundays, operating times will be revised. Trip times will be adjusted, but the number of scheduled trips operated will not change.

Eastover-Indian Head Highway Line, Route W12 Only

Weekday operating times will be revised. Trip times will be adjusted, but the number of scheduled trips operated will not change.

Georgia Avenue-Maryland Line, Route Y8 Only

A weekday Y8 trip will be added at 4:38 a.m. from Georgia Avenue and Connecticut Avenue to the Silver Spring Metro station. On Sundays, operating times will be revised. Trip times will be adjusted, but the number of scheduled trips operated will not change.

Colesville Road Line, Route Z2

All peak period trips in both directions will be diverted to Doctor Bird and Norwood Roads. The 2:30 p.m. trip from Silver Spring will be extended from Olney to Goldmine Road and Dubarry Lane. Trip times will be adjusted, but the number of scheduled trips operated will not change.

Randolph Road Line, Route Z4

Weekday operating times will be revised. Trip times will be adjusted, but the number of scheduled trips operated will not change.

Fairland Line, Route Z8

A weekday Z8 trip will be added at 5:06 a.m. from the Briggs Chaney fringe parking lot to the Silver Spring Metro station.

Briggs Chaney Fringe Lot Express Line, Route Z11

Two additional morning Z11 trips will be added from the Briggs Chaney fringe parking lot to the Silver Spring Metro station. Trips will leave the Briggs Chaney lot at 5:35 a.m., 5:55 a.m., 6:12 a.m., 6:26 a.m., 6:37 a.m., 6:46 a.m., 6:55 a.m., 7:03 a.m., 7:11 a.m., 7:19 a.m., 7:27 a.m., 7:35 a.m., 7:43 a.m., 7:51 a.m., 8:00 a.m., 8:20 a.m., 8:40 a.m., 9:00 a.m.

Old Columbia Pike Express Line, Route Z17

Route Z17 will be rerouted between Tech Road and Broadbirch Drive and Cherry Hill Road and Calverton Boulevard to Broadbirch Drive to serve Westfarm Technology Park. The number of scheduled trips will not change, but trip times will be adjusted.

Broadbirch Drive is closed to traffic until a traffic signal is installed at Broadbirch Drive and Cherry Hill Road in April. Route Z17 will operate on the present route until Broadbirch Drive is open.