2010-03-09 - Rider Down/Fatality, Weston St x Snowsfield

I disagree somewhat--there is often no additional risk associated with staying in the queue, as long as you're positioned in the primary position, as you'll still be very visible to people queued up behind you. It depends on the queue--you can't generalise completely.
That's certainly a major concern, especially for people with an acute sense of smell, and people with bad lungs.

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.)