Vijay Cheda, 27, younger brother of Arunachal Press Club President Chopa Cheda, is survived by his father, mother, four brothers and four sisters.
Vijay after inspecting the road for construction was reversing his vehicle when the accident occurred at Hunli, about 90 km away from Roing.
His body, flung out of the vehicle, was found 30 metres below the spot but the vehicle hurtled down thousands of feet down beyond recovery, family sources said.
Members of Arunachal Pradesh Union of Working Journalists (APUWJ), Arunachal Press Club (APC) and Gyadom Cheda Welfare Society expressed shock over the incident.