Deer Avoidance

After hitting a deer last fall in my wife's LR4 I triggered the airbags and ended up doing about 12k in damage to her car. I'm am hyper sensitive to deer on the road this time of year. Does anyone know of any accessory that scares the deer away?

I'm reminiscent of some whistle looking product that I put on my Chevy S-10 Blazer as a young driver. I'm not sure they actually did anything, but they made my Grandmother feel more comfortable. Regardless, I'm not putting those deer whistles on my Bimmer, but would be open to other accessory options if there is anything out there.