Department of Environmental Conservation

D E C banner

Heavy Duty Diesel Vehicle Inspection/Maintenance Program

Under 6 NYCRR Subpart 217-5, DEC has two emission inspection programs for heavy duty diesel vehicles (HDDVs):

  1. An annual emission inspection program for HDDVs registered in the New York City Metropolitan Area (New York City, Long Island, Westchester and Rockland Counties)
  2. A roadside emission inspection program for HDDVs operating on New York State roadways

HDDV emission inspections are authorized by NYSDEC Subpart 217-5 regulation, "Heavy Duty Inspection and Maintenance Program."

HDDVs are defined as diesel engine powered vehicles with a GVWR exceeding 8,500 pounds. Some vehicles in this weight class are exempt, including authorized emergency vehicles, agricultural trucks and farm vehicles, off-road construction vehicles and military vehicles. Both the annual and the roadside emission inspections conducted by a certified inspector can include a visual inspection to verify that the vehicle's emissions control equipment is functioning, a check for tampering and an opacity (smoke) test using an approved opacity meter.

Annual HDDV Inspections

The annual emissions inspection is performed at the time of the vehicle's annual NYS Department of Motor Vehicles (NYSDMV) safety inspection. This inspection applies only to HDDVs registered in the New York City Metropolitan Area and must be performed by a certified inspector. A vehicle safety inspection station that performs emissions inspections of HDDVs is authorized by the NYSDMV as an Official Diesel Emissions Inspection Station (ODEIS).

HDDV Roadside Inspections and Standards

Roadside emissions inspections are performed at various times on New York State roadways by NYS certified staff. DEC staff who are certified emission inspectors have the authority to emissions test (smoke test) HDDVs for the purpose of enforcing the 6 NYCRR Subpart 217-5 regulations and ECL 19-0320. A HDDV can be roadside inspected regardless of the vehicle's registration location.

The smoke opacity standards as listed in Subpart 217-5 are as follows: 70 percent opacity limit for vehicle engine model years 1973 and older; 55 percent opacity limit for engine model years 1974 to 1990; and 40 percent opacity limit for engine model years 1991 and newer.

Penalties for Failing Inspections

Failure of the roadside or annual emissions inspection can result in a penalty of $700.00 for the first violation and $1,300.00 for the second and each subsequent violation. These penalties can be reduced if the violation is corrected within 30 days. A retest, which may be done to seek a penalty reduction, must be conducted by an ODEIS. The roadside and/or annual inspection penalties do not apply to school buses or municipally owned HDDVs for a first violation, provided the vehicle is repaired and the violation corrected within 30 days of the cited violation.

More about Heavy Duty Diesel Vehicle Inspection/Maintenance Program: