It was an expressway. There were no lights other than cars. You're not wrong, had a human sprinted at 20mph across the expressway in the dark, I'd have hit them, too. That being said, you're not supposed to swerve and I had less than a second to react from when I saw it. It was getting hit and there was nothing I could've done.

My point was more about what happened after. The deer was gone and by the time I got to the side of the road I was probably about 1/4 mile away from where I struck it. I had no flashlight to hunt around for it in the bushes and even if I did I had no way of killing it if it was still alive.

Once I confirmed my car was drivable I proceeded home and called my insurance company on the way.

The second deer I hit was in broad daylight at lunch time going about 10mph. It wasn't injured. I had some damage to my sunroof. I went to lunch and called my insurance when I was back at the office.