Emissions testing laws are a crucial component in the fight against air pollution and climate change, yet these regulations ...

Depending on where you live in the United States, emissions testing of old cars may or may not even be a thing. There are 28 states where at least some (though not necessarily all) are required to ...

The California Air Resources Board (CARB) has certified only one telematics provider to participate in its Clean Truck Check (CTC) program with just over a quarter of the year left before heavy- and ...

Unfortunately, this book can't be printed from the OpenBook. If you need to print pages from this book, we recommend downloading it as a PDF. Visit NAP.edu/10766 to get more information about this ...

Knowing that the vehicle driving next to you on the highway is in good operable condition is important. Knowing that it’s also not spewing unsafe levels of noxious pollutants into the air is too—or at ...