That area of highway 97 is long, straight, and flat, followed by a sharp curve.

if you are headed southbound, taking that curve at a high rate of speed will carry you over the line off the road quite quickly.

if you are headed northbound, the approach into that curve sneaks up on you really fast. if you are zipping north on 97, you must reduce your speed to at or near the speed limit by the time you reach tung oil road or you will enter the curve too fast and greatly increase your chances of missing the curve and doing exactly what this driver did.