1. Dir., Ctr. for Transp. Anal., Oak Ridge Nat. Lab., Oak Ridge, TN 37831.
2. Prof. of Civ. Engrg. and Dir., Transp. Operations Program, Pennsylvania Transp. Inst., Pennsylvania State Univ., University Park, PA 16802.
3. Mgr., Forensic Services, Kilareski and Mason, P. C., State Coll., PA 16801; formerly, Res. Asst., Pennsylvania Transp. Inst., Pennsylvania State Univ., University Park, PA 16802.
4. Res. Asst., Pennsylvania Transp. Inst., Pennsylvania State Univ., University Park, PA 16802.