PSIP Advisory 298- Smoke Testing Compliance Categories Topics Enforcement Programs Heavy-Duty Diesel Inspection & Periodic Smoke Inspection Programs Tipo Information Advisory 298- Smoke Testing Compliance Advisory, provides information on the proper reading and interpretation of opacity test results using currently available smoke meters for Heavy Duty Diesel Vehicles.Updated 11/20/2019 Related Resources Test Method 435 Automated License Plate Reader Periodic Smoke Inspection Program (PSIP) Frequently Asked Questions
