As I was driving to work down a dark country road, between two empty fields, a route that I've taken daily for the past year and a half, a rectangular shape about four feet wide passed across the street in front of me. The shape was transparent, and it was only visible because I had my high-beams on. My beams kind of reflected off of it as they would off of fog. However, this shape had very definite sides. I could not tell where the top of it was, because I could not see anything beyond how high my headlights went. I first caught sight of it as it was in the oncoming traffic lane. I thought it might be a shadow, but there were no other cars on the road, and no other sources of light out of the ordinary. I realized the shape was moving across the street in front of me. I lifted off the gas, to make sure I would not intercept it. The shape did not vary in size or form as it moved to the right. The width and speed remained consistent. I had chills come across my body as I watched it travel, and realized I had no idea what it was. It reached the right side of the road when I was probably no more than eight feet away from it. At that point it was leaving the range of my headlights, and was no longer visible. For the past week and a half, I've been focusing on that portion of the road, to see if I could find any other explanation, but can't come up with anything. I'm basically just reaching out here to see if anyone has any ideas, and if anyone else has ever encountered anything like this.