CAIRO (Reuters) – Traffic cameras will be installed in the United States over the next year to help reduce crashes on highways, California Governor Jerry Brown said on Friday, as state and federal governments grappled with the worst traffic death toll in a decade.

Brown said the cameras will help reduce collisions by reducing the number of vehicles and pedestrians who are in the way of vehicles that are going around corners or speeding, as well as by preventing people from crossing over or overpasses.

The cameras will also be used to warn drivers of impending traffic hazards, Brown said, noting that California has installed more than 500,000 such cameras across the state since its implementation in 2010.

California has installed nearly 2 million traffic cameras across its state, according to a Reuters analysis of state data.

The state’s Department of Motor Vehicles (DMV) said on Thursday that at least 5,717 people were killed in traffic crashes in the state in 2016, an increase of about 7 percent over 2015.