An ill thought out idea that came from behind a desk instead of behind the wheel from the same half wits that don't realize that a load they've "cubed" won't physically fit. Yes i understand the annoyance in one truck overtaking another @ 1 or 2 mph more but if you were behind the wheel every day/night you'd do the same.
Saving the best til last, if you're a cyclist & try to make 2 lanes into 3 by sneaking between the left of a truck & the kerb instead of waiting like everybody else then don't go running to Mummy for a plaster when you get squished you frickin' idiot. You should'nt have been there in the first place. 
Agreed G but try telling many of them - you'll be branded as a creator of congestion, a polluter of the planet and an all-round faceless practitioner of capitalism.
Many cyclists now consider themselves to be the personal representatives, upon this earth, of the Deity .
We are & we Morris Dance at the weekends!
In that case, Oh Mighty One, permit me to prostrate myself and worship at the Altar of your Ribbons, Bells and Squeaking Fiddles.