Table 2 Variables measured to model the factors affecting hare–vehicle collision locations.

From: Implications for conservation and game management of the roadkill levels of the endemic Iberian hare (Lepus granatensis)

Code

Definition

Road features

Traffic (Tf)

Estimated traffic volume (vehicles/day; classes: 1. < 500; 2. 500–1000; 3. 1000–2000)

Speed limit (Sl)

Road section speed limit (km/h)

Cross (Dc)

Distance to nearest crossroad (m)

Embankment (Em)

Presence of embankment (road above surrounding land) (P/A)

Slope (Sp)

Presence of lateral cutting (road below surrounding land) (P/A)

Ditch (Dt)

Presence of marginal ditch (P/A)

Habitat features

Crops (Cp)

Total surface area covered by crops (ha)

Natural (Nv)

Total surface area covered by natural vegetation (ha)

Diversity (Pd)

Patch diversity (Shannon index; crops and natural vegetation)

Landscape features

Ecotone (Ec)

Total ecotone length (km)

Heterogeneity (Lh)

Landscape heterogeneity (Baxter-Wolfe interspersion index)

  1. Road features were measured at each collision point. Habitat-level variables were measured in a 100 m radius buffer around each collision point, while landscape-level variables were measured in a 500 m radius buffer.
  2. P/A presence/absence.
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