HDV Idling Docmuments and Links

    Memorandum of Agreement         (PDF)



    See also:  



Contact Information:

email: info@engineoff.org
phone: 512-916-6066






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Austin-Round Rock MSA (Central Texas) Heavy Duty Motor Vehicle Idling Limitations


Local governments in the 5-county Austin-Round Rock metropolitan statistical area (MSA) have agreed to implement the state rule for idling of heavy duty vehicles (HDV).  The rule limits HDV idling to 5 minutes from April 1 to October 31 (ozone season) of each calendar year
, with several exceptions in which the rule does not apply.  

As of September 1, 2009 the exemption authorizing heavy duty vehicles to idle when idling is necessary to power a heater or air conditioner while a driver is using the vehicle’s sleeper berth for a government-mandated rest period has expired.   

Although bills were introduced in the recent legislative session which would have extended the idling restriction exemption, none were ultimately passed. Therefore, the sleeper berth exemption as detailed in subsection # 12 of the state motor vehicle idling limitation rule (TAC 114.517) expired on September 1, 2009, in accordance with language contained in the rule specifying expiration. For more information see State Idling Rule Exemptions. You may also contact the Texas Commission on Environmental Quality with questions or comments at aqp@tceq.state.tx.us.


By signing a Memorandm of Agreement (MOA) with the Texas Commission on Environmental Quality (TCEQ), the following local governments have committed to implementing HDV Idling rules:
















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