Trucking accidents are on the rise. Between 2017 and 2018, fatal accidents involving large trucks increased by nearly 17% to more than 4,200, according to the Federal Motor Carrier Safety Administration (FMCSA). Most of these fatalities occurred in smaller passenger cars struck by large trucks. The risk posed to smaller vehicles by large trucks led the federal Department of Transportation to impose safety guidelines aimed at preventing serious accidents.

Here are the six most important of those guidelines.

1. Watch Your Speed