Originally Posted by
genec
How is this different from someone filtering forward at a stop, and then planting themselves right in front of the cars already stopped? Lots of cyclists do that, lots of scooter riders do that.
Originally Posted by
genec
... In Europe it is highly expected for cyclists and scooters to filter forward.
The new bike boxes in Portland are designed exactly for this sort of forward position.

When I was in London I noticed a version of the bike box that motor cycles could use as well.
There was no lane to the side to lead to the box, but cyclists and motor cyclists would filter through these impossibly narrow streets (and I thought I passed close to cars) to get in front of the line.
Originally Posted by
MnHillBilly
... The roadie went forward and then STOPPED abruptly in the dead center of the intersection, turns the bike, and plants themselves in FRONT of the lane of waiting traffic in the opposite direction currently under the red light. Positions themselves as though they're now the head of the line waiting for the light to change going the other way.
Here's a diagram from a government approved bike instruction manual that may describe the possible intention of the cyclist (it would be the #3 option - proceed as if you were coming from the right)
Originally Posted by
MnHillBilly
And to be clear - there were 2 lanes and a 3rd turn lane. This person put themselves in front of the car waiting at the middle lane...
It's also possible that the curb lane is a right turn lane and the cyclist, planning to move forward does not want to be to the right of a vehicle making a right hand turn.
Another diagram from the same manual showing lane position.
I have a very busy intersection I navigate each morning and sometimes, I can't get over to the left to make the left turn. As an alternative I stop at the front of the line of the traffic waiting at the red. It's much more safe.