Editing Compression release engine brake (section)

==Limitations==
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[[File:No Jake brakes within city limits.jpg|thumb|No Jake brakes sign]]
The use of engine compression brakes may cause a vehicle to make a loud "[[growling]]", "[[machine gun]]", or "[[jackhammer]]" like exhaust noise, especially vehicles having no mufflers, which has led many communities in the [[United States]], [[Canada]], and [[Australia]] to prohibit compression braking within municipal limits. Drivers are notified by roadside signs with text such as "Brake Retarders Prohibited," "No Engine Brake," "No Jake Brakes," "Compression Braking Prohibited," or "Unmuffled Engine Braking Prohibited," and enforcement is typically through traffic [[fine (penalty)|fines]]. Such prohibitions have led to the development of new types of [[muffler]]s and [[turbocharger]]s to better silence braking noise.

Jacobs claims that the use of the term "Jake Brake" on signs prohibiting engine retarding brakes violates their trademark and discriminates against Jacobs-brand products.<ref>{{cite web |url= http://jake-brakes.com/about-us/noise-concerns.php |archive-url= https://archive.today/20130127022926/http://jake-brakes.com/about-us/noise-concerns.php |url-status= dead |archive-date= January 27, 2013 |title=Jacobs Vehicle Systems - Noise Concerns |work=jake-brakes.com  |access-date=August 20, 2012}}</ref><ref>{{Cite news|author=Zolkos, Rodd | title=Road signs violate trademark; Municipals urged to stop using 'Jake Brakes' brand name |work=Business Insurance |publisher=Crain Communications Inc.|date=February 28, 2000}}</ref>

In the U.S. state of [[Ohio]], state law allows a [[Ohio county government|board of county commissioners]] or township trustees to prohibit the use of compression brakes within unincorporated areas. These local regulations apply to all state- and locally-maintained roads except [[Interstate Highway System|Interstate highway]]s. The state's standard "No Engine Brake" sign is designed to avoid discriminating against the Jacobs brand name.<ref>{{cite book|chapter=Signs|chapter-url=http://www.dot.state.oh.us/Divisions/Engineering/Roadway/DesignStandards/traffic/TEM/Documents/Part_02_Complete_071919Revision_bookmarked_061819.pdf|title=Traffic Engineering Manual|publisher=[[Ohio Department of Transportation]]|orig-year=2002|date=July 19, 2019|access-date=August 23, 2019|at=p. 2-15|url=http://www.dot.state.oh.us/Divisions/Engineering/Roadway/DesignStandards/traffic/TEM/|format=PDF}}</ref>