1. Associate Professor, Dept. of Civil and Environmental Engineering, Louisiana State Univ., Baton Rouge, LA 70803.
2. Biggs Cardosa Associates, Inc., 1871 The Alameda, San Jose, CA 95126; formerly, Research Assistant, Dept. of Civil and Environmental Engineering, Louisiana State Univ., Baton Rouge, LA 70803.
3. Research Development Engineer, Kansas Dept. of Transportation, Topeka, KS 66611.