Effectiveness of the Arizona Emissions Inspection/Maintenance Program 800900
During the first four years of operation, the Arizona Vehicular Emissions Inspection Maintenance Program has been effective in reducing carbon monoxide and hydrocarbon concentrations at the tailpipe of in-use vehicles. Repairs to those vehicles failing the inspection result in significant reductions in average tailpipe emissions. The magnitude of the reductions is sensitive to cutpoint selection and the requirement for maintenance.
