Roundabout CFery

[PolkaDotMankini]

Yes, there is a diagram.

This is on my commute to work. I join the motorway from a feeder road with three lanes. The first two lanes take you left on the roundabout (the way I want to go). The third lane takes you round a roundabout to join the motorway going in the other direction. There isn't an option to go straight on. Everyone joins from the same direction on the feeder road, which only goes to the motorway.

There are always long rush hour queues in the first two lanes. Some drivers cut the queues by zooming up the right-hand lane, going all the way around the roundabout and cutting into the queuing traffic joining the slip road.

AIBU to think this is CFery and refuse to let them in?

I very much doubt this splitting and merging smooths the flow at all. The splits and merges all require drivers to check, manoeuvre, check, manoeuvre ... it'll inevitably slow things down overall.

Slowing the traffic down is what smooths the flow, because it spreads out the congestion; unless, of course, the volume is too large for that to make a difference.

I completely agree it's a dick move unless the queue is reaching back to the previous junction, in which case I think it's a sensible use of space.

The main reason it's a dick move is because some people will react like the OP and start driving dangerously, or at least snarl up the roundabout causing more problems.

I think the OP's attempts to shut out anyone joining her lane is far more stupid.