A Sydney fire station have shared footage from a GoPro camera which shows dozens of inconsiderate drivers ignoring an oncoming, siren-blaring, horn-tooting fire truck.

Filmed over a 24-hour period by Mount Druitt Fire Station, the video shows motorists brazenly disregarding NSW road rules - which state that drivers must get out of the way to ensure a clear passage through traffic for emergency vehicles if they have their siren and flashing lights on.

The video shows at least a dozen incidents where the crew in the 20-tonne fire truck have to brake suddenly or are impeded from being able to travel at a higher speed, due to motorists travelling slowly in front of them.

In one incident, a white hatchback fails to give way to the fire truck at a roundabout. To make matters worse, the Toyota Yaris then continues travelling in the same lane of traffic as the fire truck, rather than pulling over to the left to give way.

A blue Toyota driver is also seen attempting to turn right, rather than veering left until the firetruck has overtaken them.

Shockingly, in one incident, a P-plate orange Holden Commodore driver actually merges into the lane of the fire truck and takes roughly eight-seconds, and countless honks of the fire truck's horn, to revert back into their original lane.