'540ing' a roundabout to save time
Discussion
waremark said:
Let us suppose that you could leave queueing traffic in a major road by turning left into a side street, go along a minor road parallel to the one in which traffic was queueing, and subsequently rejoin the queueing traffic in the major road, would there be any reason not to do that? Would things change depending on whether you might be holding up traffic on the major road where you rejoined? Is that any different from the going round the roundabout scenario?
I think the only difference with this scenario is that because some of the people queuing are going to see the queue jumping it changes perception. Same would apply at a triangle junction -2 or 3 cars turning right at a fully marked triangle junction with a reasonable sized grass triangle could often be passed by a single car using the left side of the triangle who turns right using a gap in the traffic that the other cars are not able to take advantage of but they might get wound up because they may then have to give way to car that has overtaken them - the only reason it's bad form I guess is because it is easily visible! I'd still do it though
To me it's angles of rotation - so 0 is straight on so 1 full circle of a roundabout, 360, is straight on, 1 1/4 is a right turn. But that said I've never understood the term 'giving 360 feedback' at work. Anyway...
Nothing technically wrong just anti social in my book. To legitimate it by saying it stops traffic backing up onto a road in the case of a slip road is possibly false unless both lanes are queuing at the roundabout. The length of the queue is presumably a function of the rate that cars can go down the road to the left and the odd car jumping the queue doesn't help the number of cars queuing as they have to wait longer.
I imagine people on the left will push on and try and block the 'loopers', the loopers have to push in blocking the cars genuinely wanting to turn right and we get a bit of grid lock. Sigh...
Nothing technically wrong just anti social in my book. To legitimate it by saying it stops traffic backing up onto a road in the case of a slip road is possibly false unless both lanes are queuing at the roundabout. The length of the queue is presumably a function of the rate that cars can go down the road to the left and the odd car jumping the queue doesn't help the number of cars queuing as they have to wait longer.
I imagine people on the left will push on and try and block the 'loopers', the loopers have to push in blocking the cars genuinely wanting to turn right and we get a bit of grid lock. Sigh...
doogz said:
Rubin215 said:
No, sorry, I disagree.
First exit (immediate left) is 90, straight ahead is 180, hard right is 270, all the way round and back the way you came is 360.
Anything after that is an increase of 90 (assuming a four entrance roundabout) so a 540 is once all the way round then straight ahead from your original approach.
Common sense really...
So, if you're standing up, and you turn to face the other way, you think that's 360 degrees?First exit (immediate left) is 90, straight ahead is 180, hard right is 270, all the way round and back the way you came is 360.
Anything after that is an increase of 90 (assuming a four entrance roundabout) so a 540 is once all the way round then straight ahead from your original approach.
Common sense really...
Strange.
Personally I use first/second exits or the clock system. edit: angles! http://www.mathwarehouse.com/trigonometry/referenc...
waremark said:
Let us suppose that you could leave queueing traffic in a major road by turning left into a side street, go along a minor road parallel to the one in which traffic was queueing, and subsequently rejoin the queueing traffic in the major road, would there be any reason not to do that? Would things change depending on whether you might be holding up traffic on the major road where you rejoined? Is that any different from the going round the roundabout scenario?
I've seen petrol station forecourts used for this express purpose.HereBeMonsters said:
I've seen petrol station forecourts used for this express purpose.
Indeed slip roads on congested major roads are used like this. The A1 Newcastle for example. Lots of people pull off the A1 onto a slip road, drive over the roundabout and back on the A1 again further down. With the introduction of lights on roundabouts, I'm not convinced this would actually get you further down the road any faster.If traffic is turning left it's bad form.
If traffic is going straight over and your getting out the way it's relatively sensible.
It depends whether your exit delays the main queue.
I used to do it often on a traffic light controlled roundabout.
180 is the direction of travel.
360 is the degrees of the roundabout travelled.
Doing a 180 at the roundabout requires a 360 degree traverse of the roundabout.
(Unless it's a slope style roundabout where you'll go straight over but exit rear wheels first.)
If traffic is going straight over and your getting out the way it's relatively sensible.
It depends whether your exit delays the main queue.
I used to do it often on a traffic light controlled roundabout.
180 is the direction of travel.
360 is the degrees of the roundabout travelled.
Doing a 180 at the roundabout requires a 360 degree traverse of the roundabout.
(Unless it's a slope style roundabout where you'll go straight over but exit rear wheels first.)
Edited by Snowboy on Wednesday 12th February 14:40
Snowboy said:
If traffic is turning left it's bad form.
If traffic is going straight over and your getting out the way it's relatively sensible.
It depends whether your exit delays the main queue.
I used to do it often on a traffic light controlled roundabout.
180 is the direction of travel.
360 is the degrees of the roundabout travelled.
Doing a 180 at the roundabout requires a 360 degree traverse of the roundabout.
(Unless it's a slope style roundabout where you'll go straight over but exit rear wheels first.)
What's 0 degrees then?If traffic is going straight over and your getting out the way it's relatively sensible.
It depends whether your exit delays the main queue.
I used to do it often on a traffic light controlled roundabout.
180 is the direction of travel.
360 is the degrees of the roundabout travelled.
Doing a 180 at the roundabout requires a 360 degree traverse of the roundabout.
(Unless it's a slope style roundabout where you'll go straight over but exit rear wheels first.)
Edited by Snowboy on Wednesday 12th February 14:40
wst said:
Traversal implies that one is traversing, to whit "moving", which is the opposite of stopping.
Obviously, but the quantity of that movement is zero - otherwise known as stopped.Good attempt at pedantry though, only took you a week.
Congratulations on the use of "whit" as well - who says word of the day bog roll doesn't work.
Edited by MarkK on Friday 21st February 18:15
MarkK said:
wst said:
Traversal implies that one is traversing, to whit "moving", which is the opposite of stopping.
Obviously, but the quantity of that movement is zero - otherwise known as stopped.
t in Pamplona.As for "to whit", whoop de f
king doo, I can remember a four letter word. I could think of a few others for someone with your attitude problem.The whole argument over angles is just because no-one defined anything and it's puerile. We all know what OP means.
I've often considered doing a lap to go off the 1st exit but I've always felt like people will think I'm either lost or inattentive for doing so.
Edited by wst on Friday 21st February 18:22
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