A fire in a ute has caused major delays to ACT-bound traffic on Lanyon Drive in Hume this morning.

The blaze occurred about 100m east of the border between NSW and the ACT.

Traffic heading into Hume from NSW was delayed by lane closures for several hours.

The road has now reopened fully, but traffic remained slow at 8.30pm.

ACT Fire and Rescue attended the scene and the fire has been extinguished.

An ACT Policing spokeswoman said the fire is not believed to be suspicious.