Drove through a swarm like that several years ago in eastern Nevada and into Utah.
They make a MESS of the windshield, gummy and hard to clean off without HOT soapy water.
They fly fast enough and weigh just enough to sting when they hit you.
Funny, but they do not seem to eradicate the invasive weeds, just crops.
My dad lived through the Dust Bowl years in South Dakota. He told stories about the steam trains coming through town. They’d stop, the locusts would swarm, and they’d accumulate so thick on the tracks that the driving wheels would slip when the train tried to pull out. And he said he saw swarms strip fields bare in the blink of an eye.