1. Professor, Dept. of Civil & Environmental Engineering Dept., 368 CB, Brigham Young Univ., Provo, UT 84602. (corresponding author).
2. Safety Engineer, Utah Dept. of Transportation., 4501 S. 2700 W., Salt Lake City, UT 84114.
3. Project Engineer, Geocon, Inc., 6960 Flanders Dr., San Diego, CA 92121.
4. Principal, Blaise Engineering & Consulting, 2420 Sand Creek Rd. C1272, Brentwood, CA 94513.