Metrobus service on many routes will be changed this Sunday. Following are the changes affecting Northern Virginia bus riders. For information on the changes, call Metro at 637-2437. Wilson Boulevard

Route 1D -- New rush-hour service between Jefferson Village and Ballston Metro Station via Annandale Road, Hillwood Avenue and Wilson Boulevard at 20-minute intervals. Morning rush-hour trips will leave Jefferson Village at 6:20 a.m., 6:37 a.m., 6:57 a.m., 7:17 a.m., 7:37 a.m., 7:59 a.m. and 8:19 a.m. Evening rush-hour buses will leave Ballston at 4:20 p.m., 4:40 p.m., 5 p.m., 5:20 p.m., 5:40 p.m., 6 p.m., and 6:24 p.m.

Route 1E -- Rush-hour service will operate at 20-minute intervals instead of every 15 minutes. Morning rush-hour trips will leave Castle Place and Castle Road at 6:27 a.m., 6:47 a.m., 7:07 a.m., 7:27 a.m., 7:47 a.m., 8:09 a.m. and 8:29 a.m. Evening rush-hour trips will leave Ballston at 4:30 p.m., 4:50 p.m., 5:10 p.m., 5:30 p.m., 5:50 p.m. and 6:12 p.m.

Route 1M -- Route will operate via Annandale Road to Maple Place and Columbia Pike, instead of current route via Hummer Drive and Heritage Drive to Heritage Mall. Service will be express, with no boarding or alighting between Wilson Boulevard and Livingston Street and the Ballston Metro Station. Morning buses will leave Maple Place and Columbia Pike at 6:15 a.m., 6:32 a.m., 6:46 a.m., 7:01 a.m., 7:16 a.m., 7:34 a.m., 7:54 a.m. and 8:14 a.m. Evening buses will leave Ballston at 4:23 p.m., 4:40 p.m., 5 p.m., 5:15 p.m., 5:30 p.m., 5:45 p.m., 6:05 p.m. and 6:20 p.m.

Route 1V -- Trip that leaves Ballston at 6:35 p.m. will be discontinued.

Route 1W -- Route will operate via Hummer Drive an Heritage Drive to Heritage Mall, instead of current route via Annandale Road to Maple Place and Columbia Pike. No boarding or alighting between Annandale Road and Arlington Boulevard and the Ballston Station. Morning buses will leave Heritage Mall at 6:12 a.m., 6:27 a.m., 6:42 a.m., 6:57 a.m., 7:12 a.m., 7:39 a.m., 7:49 a.m., 8:04 a.m. and 8:24 a.m. Evening buses will leave Ballston at 4:30 p.m., 4:48 p.m., 5:05 p.m., 5:20 p.m., 5:35 p.m., 5:55 p.m., 6:10 p.m. and 6:30 p.m.

Route 1X -- Trip now leaving Ballston at 6:20 p.m. will leave at 6:25 p.m.

Route 1Z -- Trips now leaving Ballston at 4:15 p.m. and 6:30 p.m. will be discontinued. Trips leaving Ballston at 4:15 p.m. and 6:30 p.m. will be discontinued. Trips leaving Ballston at 4:30 p.m. and 6:45 p.m. will leave at 4:22 p.m. and 6:40 p.m. Lee Highway

Route 3W -- Trips will be added during morning and evening rush hours. Morning buses will leave Tysons Corner at 6:11 a.m., 6:36 a.m. 6:56 a.m., 7:16 a.m., 7:45 a.m. and 8:16 a.m. Evening buses will leave Ballston at 4:20 p.m., 4:50 p.m., 5:15 p.m., 5:35 p.m., 5:55 p.m., 6:20 p.m. and 6:50 p.m.

Route 3Z -- An additional trip will be added for morning and evening rush hours. Morning buses will leave Tysons Corner at 5:56 a.m., 6:23 a.m., 6:43 a.m., 7:30 a.m., 7:23 a.m. and 7:58 a.m. Evening buses will leave Ballston at 4:05 p.m., 4:35 p.m., 5:05 p.m., 5:25 p.m., 5:45 p.m., 6:05 p.m. and 6:35 p.m. Chain Bridge Road

Route 5N -- Trips now leaving Farragut Square at 7:42 a.m. and 8:15 a.m. and the CIA at 4:33 p.m. will be discontinued.

Route 5K -- Trip now leaving George Mason at 4:20 p.m. will leave at 4:11 p.m. Trips now leaving Farragut Square at 7:25 a.m. and 5:20 p.m. will leave at 7:35 a.m. and 5:30 p.m.

Route 5S -- Trips now leaving Farragut Square at 7:10 a.m., 8 a.m. and 5:10 p.m. will leave at 7:15 a.m., 8:05 a.m. and 5:15 p.m. Trip now leaving Herndon at 3:47 p.m. will leave at 3:37 p.m.

Route 5W -- Trip now leaving Farragut Square at 5:30 p.m. will be discontinued. Trip now leaving Faragut Square at 5 p.m. will leave at 5:05 p.m. Reston Express

Route 5A -- The 5A-4 trips now leaving Newton Square at 7:11 a.m. and 11th and F streets at 4:49 p.m. will be renumbered at 5A-3 and will leave Newton Square at 7:11 a.m. and Louisiana and D streets at 4:39 p.m. The 5A-4 trip, now leaving 11th and F streets at 5:04 p.m., will be discontinued. 5

Route 5B -- The 5B-4 trip, now leaving Hunt Club and Lake Fairfax Drive at 6:39 a.m., will be discontinued. The 5B-4 trip leaving Hunt Club and Lake Fairfax Drive at 7:27 a.m. will be renumbered 5B-3, and will leave Hunt Club and Lake Fairfax Dirve at 7:27 a.m. The 5B-1 trip now leaving Louisiana and D streets at 4:52 p.m. will bypass Rosslyn.

Route 5C -- the 5C-3 trip now leaving Lousiana and D streets at 4:11 p.m. will leave at 4:16 p.m. the 5C-7 trip now leaving Louisiana and D at 4:23 p.m. will leave at 4:28 p.m.

Route 5D-F -- The 5D-3 trip now leaving Louisiana and D streets at 5:33 p.m. will leave at 5:43 p.m. The 5D-7 trip now leaving Louisiana and D at 5:54 p.m. will leave at 6:04 p.m. The 5D-4 trip now leaving Louisiana and D at 6:57 will be renumbered 5F-4, and the 5F trip now leaving the Reston ramp at 8:10 p.m. will be renumbered 5D. The 5F-4 trip now leaving 11th and F streets at 6:04 p.m. will leave at 6:14 p.m., and the 5F-7 trip now leaving Louisiana and D streets at 6:12 p.m. will leave at 6:22 p.m.

Route 5E -- A new 5E-2 trip will leave Pinecrest and Fox Mill at 6:32 a.m. The 5E-4 trip now leaving 11th and F streets at 5:24 p.m. will leave at 5:29 p.m.

Route 5G -- A new 5G-2 trip will leave Louisiana and D streets at 4:50 p.m., and the 5G-5 trip now leaving Crystal City at 5:05 p.m. will leave at 5:10 p.m.

Route 5H -- The 5H-3 trip now leaving Louisiana and D streets at 4:48 p.m. will leave at 4:53 p.m. Lincolnia-North Fairlington

Route 7E -- Route 7E trips now leaving Southern Towers at 6:56 a.m. and the Pentagon at 4:43 p.m. will be discontinued. The 7E trip now leaving Union Station at 4:20 p.m. will leave at 4:18 p.m.

Route 7G -- Trip now leaving Federal Triangle at 5:57 p.m. will be changed to operate via the Pentagon.

Route 7L -- Trip now leaving Southern Towers at 7 a.m. will leave at 6:58 a.m.

Route 7W -- Trip now leaving Pentagon at 4:36 p.m. will leave at 4:39 p.m. Fort Belvoir

Route 9A -- Route 9A/ trips now leaving 10th Street and Pennsylvania Avenue at 7:35 a.m., 8:08 a.m., 8:40 a.m. and 9 a.m. will be discontinued, and 9A/ trips now leaving 10th and Pennsylvania at 7:57 a.m. and 8:30 a.m. will leave at 8 a.m. and 8:35 a.m. The 9A/ trips now leaving Four Mile Run terminal at 4:18 p.m., 4:38 p.m. and 5:04 p.m. will be discontinued, and the trip now leaving Four Mile Run terminal at 4:08 p.m. will leave at 4:13 p.m. t National Airport-Washington

Route 11A -- Trip now leaving 10th Street and Pennsylvania Avenue at 5:51 p.m. will be discontinued. National Airport-Alexandria

Route 11B -- Trip now leaving National Airport at 5:30 p.m. will be discontinued. Alexandria-Washington

Route 12A, 14A, 15A -- On Sundays, service scheduled to arrive or leave the Pentagon before 10 a.m. and after 6 p.m. will be changed to operate to and from Federal Triangle, instead of beginning and ending at the Pentagon. Columbia Pike-Washington

Route 16C -- Trip now leaving Culmore at 6:50 a.m. will operate via the Pentagon, and the 16C/ trip now leaving Culmore at 6:54 a.m. will be discontinued. Fairfax Express

Route 20E -- Morning buses will leave Fairfax Circle at 5:55 a.m., 6:07 a.m., 6:27 a.m., 6:47 a.m., 7:02 a.m., 7:17 a.m., 7:32 a.m. and 7:47 a.m. Hayfield Farms

Route 27G -- Trip now leaving Telegraph and Franconia roads at 7:21 a.m. will operate via the Pentagon and will leave Telegraph and Franconia at 7:16 a.m.

Route 27X -- Trip now leaving Telegraph and Franconia at 7:12 a.m. will be discontinued. Annandale-Washington

Route 29B -- Trip now leaving the Pentagon at 5:11 p.m. will be discontinued, and trips now leaving the Pentagon at 4:48 p.m., 5:05 p.m. and 5:18 p.m. will leave at 4:45 p.m., 5:08 p.m. and 5:16 p.m.

Route 29E -- Trip now leaving 10th Street and Pennsylvania at 4:47 p.m. will leave at 4:50 p.m.

Route 29G -- Trip now leaving Heritage Mall at 8:44 a.m. will be discontinued, and trip now leaving Heritage Mall at 8:37 a.m. will leave at 8:41 a.m. Trip now leaving 10th Street and Pennsylvania Avenue at 4:27 p.m. will be discontinued, and trip now leaving the Pentagon at 4:34 p.. will leave at 4:37 p.m. Fairfax-Alexandria

Route 28K -- Trips now leaving George Mason University at 7:50 p.m., 8:50 p.m., 9:50 p.m. and 10:50 p.m. will leave at 8 p.m., 9 p.m., 10 p.m. and 11 p.m. Trips now leaving Wythe and Fairfax at 7:50 p.m., 8:50 p.m., 9:50 p.m. and 10:50 p.m. will leave at 8 p.m., 9 p.m., 10 p.m. and 11 p.m. Ballston-Union Station

Routes 38A and 38B -- New Saturday and Sunday schedules, with trips every 20 minutes instead of every 15 minutes. Carter-Barron-Crystal City

Route S7 -- This line will be eliminated beginning Sept. 2.