One person is dead, and there are traffic delays in-and-around Sydney after three separate truck crashes.

A driver died when two trucks smashed head-on MacArthur Drive at Wilton in the south. Picton Road has reopened westbound, after it was closed in both directions as a result.

The Cumberland Highway was also closed in both direction at Smithfield in Sydney’s west, but has since reopened after a B-double hit traffic lights.

The driver of the truck escaped injury, but the truck’s fuel tanks ruptured on impact and fuel spilled onto the roadway.

Hazmat crews were on site cleaning up the spill and motorists were re advised to avoid the area.

Cumberland Hwy is closed after a truck crash + fuel spill at Smithfield.

Northbound traffic is being diverted via Percival and Woodpark roads.

Southbound traffic is being diverted via Woodpark and Fairfield roads +The Horsley Dr. pic.twitter.com/4M8twYU2Lz

— 2GB 873 (@2GB873) November 13, 2018

And a truck and car have crashed on the M1 Pacific at the Kariong Interchange which initially closed one of two southbound lanes – all lanes have since reopened.