W D Spiegel

Summary of results from the Massachusetts and West Virginia State self-assessment projects [commercial motor vehicle operators compliance]

W D Spiegel, R J Drissel, 2005 .

Circadian rhythm for drivers in retail distribution: actual crash results

W D Spiegel, R J Drissel, 2005 .

ARE LATE-NIGHT TRUCK DRIVERS MORE DANGEROUS? NOT AT ONE COMPANY

W D Spiegel, R J Drissel, 2003 .