We will use wildlife-vehicle crash and carcass removal data that we will obtain from the Montana Department of Transportation (MDT) for the on-system routes and roads that large wild mammal carcasses have been collected along in Gallatin County, Montana, USA. The crash and carcass records should relate to animals that were hit by vehicles in 10 full recent calendar years (or close to the most recent 10 calendar years that data are available for). We will select the records that relate to large wild mammals only (i.e. larger than coyote) as collisions with small species are unlikely to be consistently included in the crash and carcass removal data. Records that relate to domestic species (e.g., livestock, horses, dogs, sheep, etc.) will also be removed.

We will then combine the crash and carcass removal data into a single new parameter by excluding potential duplicates that are close in time and space (we will follow the procedure by Fairbank et al. in prep. for US Hwy 89). The new parameter (crash and carcass data combined) will then be used to identify and prioritize the road sections that have the highest concentration of large wild mammal-vehicle collisions.

The road sections with a relatively high concentration of large wild mammal-vehicle collisions may then later be reviewed for potential future mitigation measures that are aimed at:

1. Reducing collisions with large wild mammals
2. Provide safe passages for large wild mammals, as well as other species that may be in the area (small mammals, reptiles, amphibians, aquatic species (including fish species)).