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Locally Enforced Idling Restrictions

On Diesel engines power most of the estimated 480,000 heavy-duty vehicles in the United States, and more than 40 known toxic chemicals have been identified in diesel exhaust. Recently, the World Health Organization (WHO) classified diesel exhaust as a known carcinogen, and specifically noted a casual link between exposure to diesel exhaust and lung cancer. One of the most dangerous components of diesel exhaust is particulate matter (PM). The U.S. EPA is particularly concerned with the smallest size particles, 2.5 microns in size and smaller, because they are most easily respired by people and organisms. Particulates are well known to aggravate asthma, cause lung inflammation, lead to heart problems, increase the risk of cancer, and possibly result in premature death.

To address unnecessary idling emissions, locally enforced motor vehicle idling limitations have been included as weight of evidence in the DFW 8-Hour Ozone Attainment Demonstration State Implementation Plan (SIP) and is one of several policies that NCTCOG has committed to implement in an effort to reduce air pollution and increase quality of life in the North Texas region.

On May 8, 2008, the Regional Transportation Council (RTC), the policy body for the North Central Texas Council of Governments' (NCTCOG) Transportation Department, approved a Resolutionsupporting locally enforced motor vehicle Idling restrictions in North Central Texas. 

As a result, the RTC is encouraging local government adoption of the Texas Commission on Environmental Quality’s (TCEQ) idling limitations rule as well as entrance into a North Texas Memorandum of Agreement (MOA) with the TCEQ, for the purpose of enforcement.
Exhaust from a truck idling
report an idling vehicle Go to idling home page

Under this rule, gas and diesel vehicles with a gross vehicle weight rating greater than 14,000 pounds may not idle  for more than five minutes within participating jurisdictions. 

This includes both public and private vehicles and is currently applicable year round. Several exemptions exist related to vehicle type, operations, and air-conditioning/heating provisions. NCTCOG has developed a Local Government Guide for public entities to use as a resource in implementing and enforcing idling restrictions in North Central Texas. It is requested that local governments keep NCTCOG apprised of implementation and enforcement efforts. 


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 North Central Texas Council of Governments | 616 Six Flags Drive P.O. Box 5888 Arlington, TX 76005-5888
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