• On Motorcycle training you learn to place yourselves squarely behind the driver's seat in slow-moving queues, so as to be visible in the two mirrors most often used. This also puts you right behind the exhaust on many cars. (Once you've passed your test you filter to the front any time you can do so safely, for the reasons I stated, but also of course because you're faster, and because you can.)

    Yes, this differs for pedal cyclists. The primary position is generally considered to be just to the right of the left-hand tyre tracks of motor vehicles. Note that, as with motorcyclists, this is relative to other traffic, not relative to the kerb.

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