There is nothing artistic about the black, 45-foot-long truck trailer. In fact, there is almost nothing to distinguish it from the hundreds of others that you can see being hauled down Virginia's interstates on any given day.

But inside is a remarkable little collection of art--remarkable for its quality, cohesiveness, and remarkable for the fact that it is the oldest such exhibit of its kind in the country.

Meet the Virginia Museum's Artmobile, which is currently traveling across the Northern Virginia area with an exhibit titled "Interior/Exterior" that includes 18 works by 17 Virginia artists.

Each artist has an entirely different interpretation of the theme. The more outstanding works are an acrylic on canvas entitled "A New Studio" by Anne Barbieri, "False Refuge" done with encaustic on paper by Joan Smyly Durden, plus an abstraction of interior and exterior space, an untitled print by William Harmon.

The Virginia Museum Artmobile program has been on the road since 1953 and is the oldest and the largest traveling art exhibit of its kind in the country. Each exhibit has a theme or an artistic concept. The Artmobiles are hosted in communities by chapters and affiliates of the Virginia Museum, headquartered in Richmond, the Virginia Federation of Women's clubs and, as the current "Interiors/Exteriors " is, by Virginia colleges and universities.

"Interiors/Exteriors," on exhibit at The Northern Virginia Community College, Annandale Campus, 8333 Little River Turnpike, Annandale, March 31, April 1, and April 4, and 5. For more information, call 323-3147.

Also at the Loudoun Campus, 1000 Hary Flood Byrd Highway, (Rt. 7) Sterling, April 7, 8, 11 and 12. For more information, call 323-4566.

Artmobile hours are from 9 a.m. to noon, and from 1 p.m. to 5 p.m.