Conor Quinn, 31, John Guy, 48, and 23-year-old Laura Hoy-Henry were all in a red BMW.
Conor Quinn, 31, from Derryloughan, County Tyrone, John Guy, 48, who was originally from Dublin but living in Keady, and 23- year-old Laura Hoy, from Cookstown, all died at the scene.
Two men, aged 31 and 48, and a woman, aged 23, were pronounced dead at the scene.
Three people have died following a road traffic collision in County Armagh.
Civil engineering firm Balfour Beatty says it is essential smooth travel is maintained during the major project.
Transport Scotland said it had been alerted by the contractor for the A9 roadworks of an environmental incident.
He is charged with possessing explosives under suspicious circumstances relating to a security alert in August.
The man, who is in his 30s, has been charged with possessing explosives under suspicious circumstances.
Residents have since been allowed to return to their homes.
