I'm a new member and joined originally to comment on the 29er nonsense thread. However, I've been well and truly sucked into these driving threads - wow there are some ill-informed drivers...
A bit of background. I own 6 bikes (3 road (fixie/winter/summer), 3 mtb (full-sus/ss rigid/geared rigid(all 26 inch wheels!))), a motorbike and a car (both BMWs, as it happens, because in my opinion they make the best vehicles - simple). I used to be a cycle courier so I consider myself to be very aware of other road users and I am keenly aware of cyclists when driving. I've been driving over 11 years and currently commute 90 miles a day mostly on motorbike but occasionally by car (sometimes by bike and train).
There is absolutely no reason that keen cyclists (like me) shouldn't be interested in driving and like making progress when driving. Because I like to make progress I like to do perfectly legal things like overtake on A/B roads, flash people to get out of the way when they are hogging the outside lane, filter through traffic on my motorbike etc. Yes you do get there quicker and no it's not dangerous (when done responsibly). I have chilled significantly since I was a silly teenager but still like to drive quickly.
On undertaking, many countries positively allow undertaking so it is not in itself dangerous. What is dangerous is people pulling in without checking the inside lane is clear. Personally, I always check inside before pulling in as it is a pretty sensible thing to do. If drivers don't then any accident is as much their fault as the undertaker's. I, like others, get extremely frustrated at people hogging the outside lane. It's particularly annoying in Scotland as most of our motorways only have 2 lanes! On my motorbike I give them a flash or 2, wait for a few seconds and if they don't pull over then I undertake. It is quite safe.
On merging in-turn, yes you absolutely should merge at the cones!! If the road-traffic people wanted you to merge 1/2 mile before the merge then that's where the merge would be! It's inexplicable that people don't grasp this. I agree that a sign to the effect of 'USE BOTH LANES UNTIL MERGE' would be useful to inform the thickos of how to drive. A zip effect, at the merge itself, is what 'MERGE IN-TURN' actually means. I quite enjoy driving up the outside lane past the clowns in the queue; it gets you there quicker!
In short, driving sensibly is not driving like a cock, it is driving as the law was intended.
Hey-ho, off to wind up some 29er riders now....
Seriously, good forum for the mtb chat; I look forward to sharing biking stories/experiences in due course.