1. Research Associate, Center for Transportation Infrastructure Systems, Univ. of Texas at El Paso, El Paso, TX.,
2. Research Associate, Center for Transportation Infrastructure Systems, Univ. of Texas at El Paso, El Paso, TX.
3. Executive Director, Center for Transportation Infrastructure Systems, Univ. of Texas at El Paso, El Paso, TX.
4. McIntosh Murchison Chair Professor and Director, Center for Transportation Infrastructure Systems, Univ. of Texas at El Paso, El Paso, TX.