Lam Van Vui, 36, was riding with a friend on Thuan Giao Street in Di An Town when he hit another vehicle with three men on it.
Vui and his friend were then chased by the group and attacked with machetes at the intersection near Thuan Giao Market.
Vui faced the brunt of the assault and passed out.
After the attackers left, passersby took the two to a nearby hospital, but Vui was declared dead on arrival.
The police are hunting for the suspects.