Add Yahoo as a preferred source to see more of our stories on Google. Smog hangs in the air as the sun sets after a hot day in the Los Angeles Basin on Wednesday, Oct. 4, 2023. (Luis Sinco / Los ...

Emissions testing has become a hot topic in the '90s and will continue to generate more interest as testing is enforced nationwide. You can count on it. For those rodders who have never experienced a ...

[Stay on top of transportation news: Get TTNews in your inbox.] California environmental regulators gave motor carriers a look at a tweaked heavy-duty vehicle smog inspection and maintenance program ...

Alleged members of a Southern California ring that used a device to cheat state smog inspections are facing federal charges, officials announced Thursday, April 4. An indictment unsealed Thursday in ...