@psypharmacopeia trucks of large companies have speed governors. they need to pass slower vehicles so that they can see far ahead and maintain a space cushion. their truck has a max speed, they still need to pass slower vehicles.
@NotABBWLover driver on the right has a duty to maintain a space cushion around his truck to the best of his ability. he knows the passing truck is slightly faster and should let him by to let traffic flow and leave himself outs.
@BN9 flatbed trucker here. he needs to put a half twist in each strap where its in the air not touching anything or they will vibrate like crazy in the wind. could cause damage to his roof and will be very loud.