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In observance of the 2024 holiday season, Sage offices will be closed Monday December 23rd through Wednesday January 1st. Normal operations, including shipping for orders placed during the closure, will resume on Thursday January 2nd. For technical support during this time, please visit our technical support page for assistance options. 

We wish you a wonderful holiday season. Thank you. 

David S. Timken Center for Impaired Driving Research and Evaluation

David 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 presented 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.