Here is the status of predictable openings of subway lines, in chronological order:

Red Line, Dupont Circle to Van Ness: 2 miles and three stations (Woodley Park-Zoo, Cleveland Park, Van Ness Center). The opening will be in April or May 1982 -- a five- to six-month delay from the official schedule forced by the unavilability of subway cars.

Blue Line, National Airport and Huntington: 5.2 miles and four stations (Braddock Road, King Street, Eisenhower Avenue, Huntington). The opening will be in November or December 1982. That'a a five-month delay, reflecting both the unavailability of new subway cars and the lack of a test track.

Yellow Line, Pentagon to Gallery place: 3.95 miles and one new station (Archives). The opening of this long-awaited 14th Street Bridge crossing of the Potomac River probably will be in November or December 1982, as previously scheduled, and concurrent with the Blue Line extension from National Airport to Huntington.

Red Line, Van Ness to Shady Grove: 13.8 miles and nine stations (Tenleytown, Friendship Heights, Bethesda, Medical Center, Grosvenor, White Flint, Twinbrook, Rockville, Shady Grove). The opening still is scheduled for late 1983.

Following is the best information that can be determined about the remaining segments:

Orange Line, Ballston to Vienna: 9.12 miles and four stations (East Falls Church, West Falls Church, Dunn Loring, Vienna). The official schedule calls for opening late in 1985. Much roadbed construction has been completed in the median of Interstate 66. If nothing goes wrong, if local political problems can be resolved and if federal money continues at approximately its present annual rate of $275 million, that date still is technically possible. That is a long ist of ifs.

Green Line, Anacostia to U Street: 5 miles and six stations (Anacostia, Navy Yard, Waterfront, Mount Vernon Square, Shaw and U Street). A plan to open all of this inner-city segment at one time is a new development forced by the District of Columbia government's insistence that the line share priority with some suburban segments. The official schedule calls for opening from Anacostia to Gallery Place to U Street early in 1990. If there were "no constraints on funding," the earliest this new combined section could open would be late in 1985, Egbert said. There are considerable constraints on funding.

Yellow Line, King Street to Franconia-Springfield: 6.14 miles and two stations (Van Dorn Street and Franconia-Springfield). The official schedule calls for opening late in 1986. This is an easy line to build and the only constraint will be the availability of money, which means there will be some delay.

Red Line, Silver Spring to Glenmont: 4.55 miles and three stations (Forest Glen, Wheaton and Glenmont). The official schedule calls for opening late in 1986 or early in 1987.The only constraint is the availability of federal funds for this very expensive deep rock tunnel section. a

Green Line, Anacostia to Rosecroft: 4.36 miles, four stations (Alabama Avenue, Southern Avenue, St. Barnabas Road, Rosecroft Raceway). The official schedule calls for opening in mid-1987, but that probably will slip. An uncompleted environmental impact statement and several potential lawsuits stand in the way.

Green Line, U Street to Greenbelt: 10.8 miles, six stations (Columbia Heights, Georgia Avenue, West Hyattsville, Prince George's Plaza, College Park and Greenbelt). The offical schedule calls for this segment to open from Fort Totten to Greenbelt in mid-1988 and from U Street to Fort Totten in 1990. Several route alignment questions remain, potential lawsuits lurk and this section is a strong candidate to be the last one to open.