Truckie killed in fiery crash in Sydney

A truck driver transporting a load of wool has died in a fiery crash in northern Sydney.

Emergency workers called to the M1 at Mount Kuring-Gai about 2.30am on Tuesday found the prime mover had crashed into the median strip and rolled.

Police said the truck caught fire and its load of wool was burned. The body of a man, believed to be that of the 22-year-old driver, was found inside the rig.

Motorists are being urged to avoid the area, with the motorway closed northbound and reduced to two lanes southbound as of midday.

Meanwhile, a pedestrian has died in hospital on Tuesday after he was struck by a car while walking across a Harris Park bridge footpath in Sydney's west on February 23.

The 52-year-old woman behind the wheel of the SUV will now face a fresh charge of driving in a dangerous manner occasioning death when she faces local court later on Tuesday.