Not necessarily. Two lanes entering RAB. LH lane queued RH lane empty.
If nobber goes to front of RH lane then the next time there is a gap it means 2 rather than one car can enter RAB. As nobber goes round the constant stream of traffic entering from the RH lane causing the queue in nobber's entry road will have to stop creating a gap.So in fact nobber is not stealing anyone else's gap as he shares a gap with a car from the LH lane. As he goes round nobber causes the traffic from the right to stop thus creating another gap. Therefore nobber's lap of the RAB actually shortens the q in the LH lane (in some circumstances).
Fair point, it is more complicated than I made out. However:
[list][*]Nobber takes up space on the circulatory and doesn't create new gap opportunities, yes they cause other approaches to give way as they go round the roundabout but this is of no bonus to anybody else as knobber takes up the space on the road that the other traffic would have occupied, the other traffic still need to go through the roundabout so will take the next gap. The knobber takes up a gap on the circulatory that could have been used for several people to enter and exit the roundabout which means there are less gaps for everybody else, which causes more queues and delays for everybody else.[/*]
[*]The left turn has a single lane exit and this constrains the maximum capacity. The bonus of two cars with a left turn destination crossing the give way line at the same time is taken back when knobber causes left traffic to stop and give way when they filter back into the left turning traffic stream. Actually, the knobber further reduces capacity: headway for an unopposed traffic stream is ~1 car every 2 seconds because you can run a tight headway when following a moving vehicle, this capacity roughly halves to 1 car every 4 seconds for an opposed traffic stream as people need more headway when accelerating into a gap in front of/behind moving traffic.[/*]
[*]Back to what I previously said, the nobber doing a 540 screws all the other approaches too, not just the approach they arrived on.[/*][/list]
Erm... 270 would be a left turn after 3/4 of a lap of the roundabout!
You've described it exactly how people drive it, so yes.
TBH I totally understand the confusion here, going straight over a roundabout could be considered 0deg(change in attitude) or 180deg (how far round the clock/compass you have travelled) depending on your frame of reference. Likewise doing a U turn could be considered 180deg or 360deg. 540deg is just a lot more convenient that saying 'all the way round the roundabout 1 and a half times'.
Why don't you just do that?
I've just re-read and my response makes no sense as a reply to aracer, it's a reply to someone or something though. Apologies aracer, not having a pop, just explaining. 😳
Not only is this manoeuvre queue jumping, but it holds up traffic on all 4 entries while the lap is completed.
It's about as selfish as driving can get.
if you're talking 3 lanes coming into the roundabout, and 2 lanes out, then I'd say you can use any lane coming in, to go straight over. And Better to use up space instead of jamming up one lane.
Unless there are arrows/signs etc to the contrary.
But if there's only one lane out it wouldn't make sense
So how do you know if there's one lane out or two?
There're way too many signs/markings these days, once you start getting comfortable they throw some new designation at you.May be ok if you drive for one hour a day, but if you're driving 8hours a day it takes up much too much attention
