A firebreak or double track (also called a fire line, fuel break, fireroad and firetrail in Australia) is a gap in vegetation or other combustible material that acts as a barrier to slow or stop the progress of a bushfire or wildfire.
Additional goals are to maintain the ecology of the forest and to reduce the impact of wildfires on air pollution and the global climate, and to balance the costs and benefits of the various projects.
In many cases, it may be useful for firebreak upkeep to be maintained along with the harvesting of forestry products, such as lumber and biomass fuel, since the objectives are fundamentally related, in that the basic goals are to remove material from the forest.
Larger trees are sometimes left in place within some types of firebreaks, to shade the forest floor and reduce the rate of fuel accumulation, and to enhance the landscaping in recreational and inhabited locations.
For example, during the Cedar Fire of 2003, strong Santa Ana winds had blown enough burning embers across a 10-lane section of Interstate 15 to ignite the vegetation on the other side.