The Gwydir Highway has re-opened in both directions in Delungra, west of Inverell, after an earlier car crash.
A car struck a power pole and brought down wires before 9am on Wednesday.
Crews will need to carry out repairs, emergency services said.
A spokesperson for NSW Ambulance reported earlier this morning that a patient was being assessed on the scene after a single vehicle had gone into a pole.
DELUNGRA: Gwydir Hwy has reopened under stop/slow after crash which brought down power pole & wires. Diversion lifted but exercise caution.— Live Traffic NSW (@LiveTrafficNSW) September 13, 2017