When I took drivers ed in 1968 the local law was no lane changes within 100 feet of or inside an intersection.
Both that right turn AND the land change w/o signaling is illegal.. but people do it all the time
Also "Right turn on red" Everywhere I know of it is "STOP" "Look" "Turn" and I assume the guy in the left is an insurance fraudster who will change lanes so he can bump into me and claim whiplash so I wait for him to pass too. (Ok that's not the real reason I wait. but it's close enough).
There are several things I was taught that later in life I found....wrong. For a traffic example.
I was taught tin school to ride my bicycle on the LEFT facing oncoming traffic.
Later I read the actual law (Michigan Vehicle Code) And still have a copy handy.
Bicyclists must, with very few exceptions, obey ALL traffic laws.. and a few more besides
The exceptions: You can get off the bike and WALK it through an otherwise illegal left turn
(You can not ride it through the turn must walk)
And depending you may be able to ride on the sidewalk at reduced speed (like 4MPH or 7MPH)
On a one-way street. slow down and sidewalk
Some roads (IE: Limited access & Freeways) Unlike one of my work partners you may not ride. He landed in hospital when he did. (Got the ticket too)
Must obey stop signs, red lights, speed limits where applicable, and yield where applicable.
They forget to mention all that in school..
But it's in the law also in "What Every Bicyclist Must Know" (A booklet from DMV or MI-SOS)