Red Light of the Exhaust Analyzer Indicates That This Car Failed the Test at the Auto Emission Inspection Station at Norwood Ohio. A Red Light Will Glow If Either the Carbon Monoxide Or Hydrocarbon Emissions Are Above the Maximum Limits for a Particular Model Year. The Car Owner Will Be Given a 30-Day Sticker to Have His Auto Repaired and Be Returned for Retesting.
If the Vehicle Is Not Certified Within That Time, It Can Be Ticketed by the Police 09/1975. Photographer: Eiler, Lyntha Scott. Original public domain image from Flickr