Across the United States, the rules for checking tailpipe pollution are quietly shifting, even as climate targets grow more ambitious and electric vehicles grab headlines. States are carving out ...

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 National Highway Traffic Safety Administration collects crash data about autonomous vehicles, but only issues voluntary guidelines about expectations for those vehicles. Those guidelines softened ...