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Bus vs bike - John C. Kirk — LiveJournal

Mar. 31st, 2009

11:57 pm - Bus vs bike

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Date:April 1st, 2009 12:53 am (UTC)
Yup, that's the junction. (Although I'm not quite sure about the panda in the bottom-right corner!)

Thanks for the advice; I knew about the "wait until your exit is clear" rule, but I'd been interpreting that differently, i.e. "if the lights changed and all the other traffic stopped moving, could I get out?"

If I stop in the middle, I think the tricky bit will be working out how far forward I should be. If I'm in the nearer half of the box, I'll be blocking the exit for oncoming vehicles that want to turn right; that's ok if we can gracefully turn around each other, but it would be a problem if the traffic behind them is going straight on (blocking me). On the other hand, if I stop in the further half of the box, I'll basically have to do a U turn to get to my exit. That's not too bad on a bike, but I wouldn't fancy trying that in an ambulance!
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Date:April 1st, 2009 07:26 am (UTC)
You stop in the way of people going straight on, coming from your right. Because their light will be red. People coming towards you and turning right will turn in front of you. Then (worst case), when the lights go red for you and the guys in front of you, you will have time to turn before they go green for the guys on your right and left.

Another way to think of it is to divide the box into quarters. You stay towards the centre of the quarter nearest to you, clearly signalling right. People behind you going straight on use the left bit of your quarter, and the quarter in front of you. People in front of you going straight on use the two quarters to your right. People turning right don't cut into your quarter until they're past you. So you have to cycle forwards and then turn when the way is clear (or do a near-side to near-side turn with someone who has also been waiting).

Never, never assume that people are going to do something based only on their signalling. Look at where they are on the road, and if necessary, wait until their position on the road makes things clear. This is particularly true of people who are not signalling at all; in my experiences, about 50% of them (more at some junctions) are actually intending to turn.
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