This Washington Metropolitan Transit Authority will adjust bus schedules Tuesday on routes serving the Fairlington, Lincolnia, Shirley Duke, West Springfield and Kings Parks communities. The changes are being made to provide more service to and from the Pentagon Metro station.

In many cases, buses that are not completely utilized by passengers boarding or getting off in the District will be routed to the Pentagon station where passenger loads are heavy. Route Changes

Route 7D - Eliminate the 6:50 a.m. trip from Claremont and the 4:28 p.m. trip from the Pentagon.

Route 7E - Eliminate the 4:38 p.m., 4:58 p.m., 5:18 p.m. and 5:58 p.m. trips from the Pentagon; adjust the 4 p.m. and 5:38 p.m. trips from National Visitor Center to stop at the Pentagon station. Adjust Route 7E/trips previously scheduled to leave Southern Towers at 7:18 a.m. and 7:38 a.m. to leave at 7:15 a.m. and 7:35 a.m.

Route 7G - Eliminate 4:26 p.m. and 5:26 p.m. trips from 10th and Pennsylvania NW; adjust 4:12 p.m., 4:41 p.m., 5:11 p.m. and 5:42 p.m. trips from 10th and Pennsylvania to leave at 4:16 p.m., 4:36 p.m., 5:16 p.m. and 5:36 p.m.

Route 7L - Adjust 6:42 a.m., 7:03 a.m., 7:23 a.m., 7:43 a.m. and 8:03 a.m. trips leaving Southern Towers to leave at 6:42 a.m., 7:03 a.m., 7:20 a.m., and 8 a.m., and also reroute trips to stop at Pentagon station; 4:20 p.m., 4:40 p.m., 5 p.m., 5:20 p.m., 5:40 p.m. and 6 p.m. trips leaving Southwest Terminal will be rerouted via the Pentagon station.

Route 7W - Eliminate 4:15 p.m., 4:35 p.m., 4:51 p.m., 6:01 p.m., and 6:25 p.m. trips leaving the Pentagon; and 4:41 p.m. and 4:56 p.m. trips leaving 10th and Pennsylvania NW. Adjust 7:01 a.m. trip leaving Lincolnia and Quantrell to leave at 6:57 a.m.

Route 7X - Eliminate 6:46 a.m. trip leaving Route 236 and Beauregard Street; adjust 3:52 p.m., 4:01 p.m., 4:16 p.m., 5:31 p.m. and 5:55 p.m. trips leaving the National Visitor Center to stop at the Pentagon; adjust 6:53 a.m. trip leaving Route 236 and Beauregard to leave at 6:50 a.m.

Route 8P - Eliminate 4:30 p.m. and 6:08 p.m. trips leaving the Pentagon.

Route 8X - Adjust 4:13 p.m., 4:32 p.m., 4:52 p.m., 5:12 p.m., 5:32 p.m. and 5:56 p.m. trips leaving 10th and Pennsylvania NW to stop at the Pentagon station.

Route 8W - Adjust 4:48 p.m., 5:08 p.m., 5:28 p.m. and 5:48 p.m. trips leaving the Pentagon to leave at 4:53 p.m., 5:13 p.m., 5:33 p.m. and 5:53 p.m.

Route 16C/ - Eliminate 8 a.m. trip leaving Culmore; adjust 7:53 a.m. trip leaving Culmore to leave at 7:57 a.m.

Route 17K - Adjust all inbound trips to originate at Braddock and Twinbrook Roads and all outbound trips to stop at Braddock and Twinbrook to provide new service to Kings Park West, Somerset West and Briarwood.

Route 18G - Eliminate 5:41 p.m. and 6:01 p.m. trips leaving the Pentagon; adjust 6:38 a.m. and 6:53 a.m. trips leaving Keene Mill and Greeley to leave at 6:35 a.m. and 6:51 a.m. and stop at the Pentagon station; adjust the 4:23 p.m. and 5:28 p.m. trips leaving 10th and Pennsylvania to stop at the Pentagon station.

Route 18G/ - Eliminate the 6:34 a.m., 6:48 a.m., 7:08 a.m., 7:28 a.m. and 7:41 a.m. trips leaving Kenne Mill and Greeley.

Route 1811 - Adjust the 4:26 p.m., 4:46 p.m., 5:06 p.m., 5:26 p.m., 5:46 p.m. and 6:06 p.m. trips leaving the Pentagon to leave at 4:31 p.m., 4:51 p.m., 5:11 p.m., 5:30 p.m., 5:50 p.m. and 6:10 p.m.

Route 18K - Eliminate the 6:54 a.m. trip leaving Keene Mill and Greeley; eliminate the 4:32 p.m. and 4:54 p.m. trips leaving the Pentagon; adjust the 4:54 p.m., 5:14 p.m. and 5:54 p.m. trips leaving the Pentagon to leave at 4:58 p.m., 5:16 p.m. and 5:55 p.m. and operate as 18G trips.

Route 18AA - Adjust the 5:53 a.m., 6:17 a.m., 6:37 a.m., 6:53 a.m., 7:13 a.m. and 7:33 a.m. trips leaving Keene Mill and Greeley to leave at 6:41 a.m., 6:34 a.m., 6:50 a.m., 7:10 a.m., 7:30 a.m. and 7:50 a.m. and to stop at the Pentagon station; adjust the 4:10 p.m., 4:29 p.m., 4:49 p.m., 5:09 p.m., 5:29 p.m. and 5:50 p.m. trips leaving the Southwest Terminal to stop at the Pentagon station.

Route 26C - Eliminzte this route. Alternate service is provided by the Alexandria Senior Citizen Trolley.

For more information about individual route changes, call the transit authority telephone information service at 637-2437.