It's a bit louder than we expected it to be, but not even close to sleep-awakening racket made by a diesel big rig.
There's that audible electric motor whine present, but we can live with that.
Soon, the roads will be so much more peaceful without the diesel clanking, smoke belching rigs of today around.
"I caught these 2 Tesla Semis stopping at the Rocklin Tesla showroom to charge on their trip from Sparks, NV to Fremont, CA."
Bonus video below featuring a Tesla Model S next to the Tesla Semi at the Rocklin Supercharger.