David S TimkenDavid S. Timken, Ph.D. has over 45 years experience in the traffic safety field. His specialty areas include the assessment, education and treatment of DWI offenders and he provides consultation, research and training. He is widely published and has resented numerous papers internationally as well as throughout the U.S. He holds membership in a number of professional organizations including the International Council of Alcohol, Drugs and Traffic Safety. Dr. Timken maintains a small clinical consultation practice. Read More Read Less