ROCKY MOUNTAIN SECTION OPTICAL SOCIETY OF AMERICA
                              &
           IEEE LASERS AND ELECTROOPTICS SOCIETY


                      January Meeting

Date:  Thursday, 15 Jan. 1998
Time:  7:00 PM cookies, etc., 7:30 PM talk
Place: National Institute of Standards and Technology
       325 Broadway, Boulder, CO
       Room 1107


Remote Sensing of Automobile Exhaust

       Donald H. Stedman
       Brainerd Phillipson Professor of Chemistry
       University of Denver
       Denver, CO 80208
       (303) 871-2580
       (303) 871-2587 FAX


Abstract:

Infra-red and ultraviolet light beams are transmitted across a single lane of 
roadway (typically a freeway ramp) about a foot off the ground. On the other 
side of the ramp a detector system analyses the readings and thus determines the 
exhaust pollutants, including taking a freeze-frame video picture of the vehicle 
license plate for make/model year identification. The system operates in under 
one second per vehicle, thus obtaining 10,000 to 20,000 emissions readings per 
day. The results of these measurements can be used to evaluate the effectiveness 
of motor vehicle control programs including catalysts, oxygenated fuels and 
emission testing mandates. Catalysts and the associated emissions control 
technology have been even more effective than predicted, while most other 
programs have been much less effective. The SMART SIGN at the exit from I-25 to 
Speer Blvd. has been operated for over a year, has provided more then three 
million readings and has apparently resulted in more than 4,000 voluntary 
repairs. These and other recent results will be described.


Biography:

Education
  B.A., Cambridge University, England, 1964
  M.Sc., University of East Anglia, England, 1965
  Ph.D., University of East Anglia, England, 1967 (with M.A.A. Clyne)

Employment
  University of Denver, Brainerd F. Phillipson Professor of Chemistry
  University of Michigan, Visiting Lecturer to Professor, 1971-83
  Depts. of Chemistry and Atmospheric and Oceanic Science (jointly)
  Ford Motor Company, Research Scientist Senior, 1969-71
  Kansas State University, Postdoctoral Fellow, 1967-69

Professional Societies
  Air & Waste Management Association
  American Chemical Society
  American Association for the Advancement of Science

Honors and Awards
  American Chemical Society Colorado Section Award, 1997
  Air & Waste Management Association Frank A. Chambers Award, 1996
  American Chemical Society for Creative Advances in 
Environmental Science and Technology, 1996 
  University Lecturer, University of Denver, 1994-95 
  Cambridge University, M.A. (Honorary), 1968

National Committee Service has included:
  NAS-NRC Committee on Airline Cabin Air Quality
  NIH Spec8ial Study Sections
  UCAR Members Representative

Over 175 Refereed Publications and book chapters in Atmospheric Chemistry, 
Chemical Kinetics, Trace Gas Analysis, Chemiluminescence, and Remote Sensing and 
ten U.S. patents. Publications include:

"On-road Vehicle Emissions: Regulations, Costs, and Benefits", Stuart P. Beaton, 
Gary A. Bishop, Yi Zhang, Lowell L. Ashbaugh, Douglas R. Lawson, and Donald H. 
Stedman, Science, 268:991-993, 1995.

"Worldwide On-Road Vehicle Exhaust Emissions Study by Remote Sensing",  Y. 
Zhang, D.H. Stedman, G.A. Bishop, Paul L. Guenther, Stuart P. Beaton, Environ. 
Sci. Technol., 29:2286-2294, 1995.

"Enhancement of Remote Sensing for Mobile Source Nitric Oxide", Y. Zhang, D.H. 
Stedman, G.A. Bishop, S.P. Beaton, P.L. Guenther and I.F. McVey, J. Air Waste 
Manage. Assoc., 46:25-29, 1996.

"Measuring the Emissions of Passing Cars", G.A. Bishop and D.H. Stedman, Acc. 
Chem. Res., 29:489-495, 1996.

"On-Road Evaluation of an Automobile Emission Testing Program", D.H. Stedman, 
Gary A. Bishop, P. Aldrete and R.S. Slott, Environ. Sci. Technol., 31:927-931, 
1997.