Headed toward Kansas City on I-70 there are signs that say "no jake brakes." What's that mean?
"Jake brakes" refers to the downshifting system or engine brake that truck drivers use to slow down without using their brakes. Although jake brakes reduce the wear and tear on the truck brakes, they also make a lot of noise, often prompting complaints from nearby residents.
"The intent of a 'no jake brake' sign is noise reduction," said David Church, traffic signing engineer at the Kansas Department of Transportation.
The term "jake brakes" refers to Jacobs Vehicle Systems, the original maker of the engine brake.