NORFOLK, Va. (WVEC/AP) - A hydrogen airship crash in Norfolk that killed nearly three dozen people in 1922 is among several topics that will be highlighted on new highway markers across the state.

Officials have approved 12 new historical highway markers that will memorialize people and events throughout Virginia history.

A marker in Norfolk will memorialize the crash and explosion of the Roma, a U.S. Army hydrogen airship that was based at Langley Field in Hampton in 1922. The crash killed 34 of 45 officers, crewman and civilians on board.

Another sign in the Richmond-area will tell the story of the Imperial Airlines Flight 201/8 crash, which killed 74 Army recruits and three of five crew members on November 8, 1961.

In addition to the new signs, officials are planning to replace 20 older historical markers.