Trucker question ...tire related

when i drive by a big rig i like to roll the window down to listen to it ....i notice the wide tire makes more noise (maybe my imagination)

also i notice that you dont hear the little whine from the engines anymore .....it used to sound like a turbo with a smooth whine and i notice i dont hear thats so much anymore.

also i used to see trailers that said M.S. Carrier

i notice i dont see those around anymore the trailers used to be orange.