Is it legal to go all the way round a Mini- roundabout ?

[Ledaig]

oldsoak said:

Zero degrees is your starting point...lets call it South (just for $hits and giggles you understand?)

Ok yep with you

oldsoak said:

If you are on a roundabout west(left) is 90 degrees North is 180 degrees and east (right) is 270, you need to pass est north and east to get back to south where you started.

Noooooo......just because you (as you rightly say) PASS West, it does not mean that you have to TURN West to initiate the manoeuvre so that doesn't count, which then means you're already facing North, so that doesn't count either. Your first 90deg turn is to the East and so on.

oldsoak said:

na na ne nah nah...you suck at geometry!

Maybe, but do I get any bonus points from the spelling stazi for the correct use of your and you're?

[julian64]

oldsoak said:

Ledaig said:

oldsoak said:

Ledaig said:

oldsoak said:

Ledaig said:

oldsoak said:

He would need to do at least a 360 to go back the way he'd come from...

Is that the manoeuvre commonly known as a 180?

Only if there are 180 degrees in a full circle

Lets try this a different way

You approach roundabout heading North, exits are West(left) and East(Right), this forms the T junction. You need to turn West, so you enter roundabout and turn 90deg to face East, you turn another 90deg to face South, you turn a further 90deg to face West - your exit left. Total 270deg

Show me where I'm missing something (please)

So not finished digging?
Ok....
at this T-junction -cum-roundabout...
If you turn immediately left you have turned 90 degrees ...Yes?
If there was a straight on road (which there isn't) that would be 180 degrees...yes?
If you went through the 180 and turned right you would have completed 270 degrees ...is it sinking in yet?
Go another 90 degrees (making 360) and you go back the way you came...travel another 90 degrees and you are back to that left turn again and you have completed how many degrees

Ahhh, but this is a mini roundabout, straight on is therefore 0 degrees and hence your starting point. Left would be 90, but your not turning that way (to the left) your turning to the right.

oldsoak said:

[...go on take your socks off if it helps...

Cheeky git




this is gonna run.......

You bet it is!
OK so I've nowt better to do and it is Friday so what the 'l'

Zero degrees is your starting point...lets call it South (just for $hits and giggles you understand?) If you are on a roundabout west(left) is 90 degrees North is 180 degrees and east (right) is 270, you need to pass west north and east to get back to south where you started. On doing that you have completed 360 degrees...in fact turned a full circle. Now WAKE UP AT THE BACK THERE! travel a further 90 degrees and you are back at the West (left) turn 360 plus 90 is....?

na na ne nah nah...you suck at geometry!

Straight on is 180 degrees, did you go to school?

Left is -90, striaght on is 0 obviously , right is +90, back where you came from is 180, and to the left after going all the way round the roundabout is +270 positive.

Honestly stop digging the hole.

[oldsoak]

Ledaig said:

oldsoak said:

Zero degrees is your starting point...lets call it South (just for $hits and giggles you understand?)

Ok yep with you

All hail the magnificent OZ...oops soz wrong story...Well done.

oldsoak said:

If you are on a roundabout west(left) is 90 degrees North is 180 degrees and east (right) is 270, you need to pass est north and east to get back to south where you started.

Ledaig said:

Noooooo......just because you (as you rightly say) PASS West, it does not mean that you have to TURN West to initiate the manoeuvre so that doesn't count, which then means you're already facing North, so that doesn't count either. Your first 90deg turn is to the East and so on.

On that roundabout how many degrees must you travel to reach the west (left) point...could it be...no surely not...90?

oldsoak said:

na na ne nah nah...you suck at geometry!

Ledaig said:

Maybe, but do I get any bonus points from the spelling stazi for the correct use of your and you're?

Go on then, 'A plus' for the grammar and punctuation, 'unclassified' for the rest.

[Greenpis]

julian64 said:

Straight on is 180 degrees, did you go to school?

Left is -90, straight on is 0 obviously , right is +90, back where you came from is 180, and to the left after going all the way round the roundabout is +270 positive.

Honestly stop digging the hole.

Only when the car turns on it's axis.

Like you can with a toy car, or imagine a scaffold pole through the middle of the car and you rotate the car on it. 180 means you face the opposite direction.

When following a central obstruction such as a rbt island, painted or raised, you're no longer on the car's axis. So you do turn through 360 degrees as if you have followed the circumference of a circle, and yet you are still only facing the way you came.

Crossed purposes me thinks, where's that foglight thread..............

[Ledaig]

oldsoak said:

Ledaig said:

Noooooo......just because you (as you rightly say) PASS West, it does not mean that you have to TURN West to initiate the manoeuvre so that doesn't count, which then means you're already facing North, so that doesn't count either. Your first 90deg turn is to the East and so on.

On that roundabout how many degrees must you travel to reach the west (left) point...could it be...no surely not...90?

Errr...none, you drive straight forward onto the mini roundabout and you're already facing North

oldsoak said:

na na ne nah nah...you suck at geometry!

Ledaig said:

Maybe, but do I get any bonus points from the spelling stazi for the correct use of your and you're?

oldsoak said:

Go on then, 'A plus' for the grammar and punctuation,

I thank you sir

Edited by Ledaig on Friday 27th November 15:00

[oldsoak]

Greenpis said:

julian64 said:

Straight on is 180 degrees, did you go to school?

Left is -90, straight on is 0 obviously , right is +90, back where you came from is 180, and to the left after going all the way round the roundabout is +270 positive.

Honestly stop digging the hole.

Only when the car turns on it's axis.

Like you can with a toy car, or imagine a scaffold pole through the middle of the car and you rotate the car on it. 180 means you face the opposite direction.

When following a central obstruction such as a rbt island, painted or raised, you're no longer on the car's axis. So you do turn through 360 degrees as if you have followed the circumference of a circle, and yet you are still only facing the way you came.

Crossed purposes me thinks, where's that foglight thread..............

Top of the class...now where did I put those 'Prefect' badges....?

[Ledaig]

oldsoak said:

Greenpis said:

julian64 said:

Straight on is 180 degrees, did you go to school?

Left is -90, straight on is 0 obviously , right is +90, back where you came from is 180, and to the left after going all the way round the roundabout is +270 positive.

Honestly stop digging the hole.

Only when the car turns on it's axis.

Like you can with a toy car, or imagine a scaffold pole through the middle of the car and you rotate the car on it. 180 means you face the opposite direction.

When following a central obstruction such as a rbt island, painted or raised, you're no longer on the car's axis. So you do turn through 360 degrees as if you have followed the circumference of a circle, and yet you are still only facing the way you came.

Crossed purposes me thinks, where's that foglight thread..............

Top of the class

Go out to a car park tonight, put a compass on your dashboard, face North to start with. Now move off, turn the steering wheel to the right and keep turning until you are facing West. How many degrees on the compass have you turned?

oldsoak said:

now where did I put those 'Prefect' badges....?

I've nicked 'em

[pacman1]

Oldsoak, for the 450 deg to be correct, you need to be facing south to start.
Because you are facing north to start, you have technically already travelled 180 deg before you start the manoeuvre.

[julian64]

oldsoak said:

Greenpis said:

julian64 said:

Straight on is 180 degrees, did you go to school?

Left is -90, straight on is 0 obviously , right is +90, back where you came from is 180, and to the left after going all the way round the roundabout is +270 positive.

Honestly stop digging the hole.

Only when the car turns on it's axis.

Like you can with a toy car, or imagine a scaffold pole through the middle of the car and you rotate the car on it. 180 means you face the opposite direction.

When following a central obstruction such as a rbt island, painted or raised, you're no longer on the car's axis. So you do turn through 360 degrees as if you have followed the circumference of a circle, and yet you are still only facing the way you came.

Crossed purposes me thinks, where's that foglight thread..............

Top of the class...now where did I put those 'Prefect' badges....?

Oh god, theres two of them. Honestly you two should be ashamed of yourselves.

[oldsoak]

Ledaig said:

Go out to a car park tonight, put a compass on your dashboard, face North to start with. Now move off, turn the steering wheel to the right and keep turning until you are facing West. How many degrees on the compass have you turned?

Sigh...
The biddy in the OP went around a roundabout completely 1 and 1 quarter times to turn left.
A full circle ( or a roundabout) has 360 degrees (surprise surprise there are also 360 degrees on a compass too)...go around it once and you traverse through 360 degrees go around it 1 and a quarter times and you traverse through 450 degrees.

oldsoak said:

now where did I put those 'Prefect' badges....?

I've nicked 'em

I can believe it..anything to cause trouble. As me old Mam used to say..."You'd cause trouble in an empty house"

[Simbu]

Wow, didn't expect to see THIS!

For the avoidance of doubt, let me explain the situation in more detail and you can argue amongst yourselves whether I was right or not

The T junction roundabout is created by a road travelling North-South. It its intersected by a road that joins it on the West side. At the point where the roads meet, is the mini roundabout. The car was travelling Nouthbound and wanting to turn left to go Westbound. So it goes up the right-hand lane, doubles back on himself on the mini roundabout (my interpretation of 180 degrees) and goes another 90 degrees to take the left exit to head Westbound.

As you were...


ETA for crappy grammar

Edited by Simbu on Friday 27th November 15:43

[oldsoak]

pacman1 said:

Oldsoak, for the 450 deg to be correct, you need to be facing south to start.
Because you are facing north to start, you have technically already travelled 180 deg before you start the manoeuvre.

And you need sectioning
This is a ROUNDABOUT we're talking about here, not a car on a pole you move forward and follow the circumference of what is a big CIRCLE...there are 360 degrees in a full circle....if you go around that circle completely, you have travelled through 360 degrees. Go around it 1 and a quarter times and you have gone 450 degrees.

ETA
your 180 is only possible if the car spins on its own axis...but unless you are pulling HB turns it doesn't do that does it...no ,you follow the circumference of the roundabout and to end up at the place you started from you MUST travel through 360 degrees.

Edited by oldsoak on Friday 27th November 15:52

[pacman1]

For 360 deg to equal a full circle here which (it always does, without exception), the car's front bumper has to be pointing away from the circumference of the mini roundabout at all times. Your start point, ie the car bumper facing into the centre of the roundabout, ie north facing, is in fact +180 deg not 0 deg. The maths don't lie!

[Greenpis]

julian64 said:

Oh god, theres two of them. Honestly you two should be ashamed of yourselves.

Could be the same person with a split personality.
But both personalities think the same on geometry.

And both personalities are right on this one of course.

Or for this subject should it be one of these:



Now the 4pm question - how may degrees does Mr Smilie rotate through.....................

[pacman1]

The 270 deg brigade are taking the start point as 0 deg.
Oldsoak is taking his (did he but know it) at +180, then adding 270 to it.
What would the satnav say?

When we drive forward straight, we are all doing so at 180 deg "true" to the circle
When we reverse straight, the same applies, because we haven't turned the car round relative to that same circle. It's all about circle start points see.

Edited by pacman1 on Friday 27th November 16:20

[oldsoak]

pacman1 said:

The 270 deg brigade are taking the start point as 0 deg.
Oldsoak is taking his (did he but know it) at +180.
What would the satnav say?

Wrong again fella ...keep trying though. Once you acknowledge the idea that a car has not got a spike through it into the ground and only turns on that spike you'll get the rest...honest you will.

[julian64]

pacman1 said:

The 270 deg brigade are taking the start point as 0 deg.
Oldsoak is taking his (did he but know it) at +180.
What would the satnav say?

Honestly, the internet lives forever. Do you really want your children, and your childrens children seeing this thread and realising the state of their grandfathers education?

According to you if you drive straight across a roundabout never moving the steering wheel, you have actually done a 180 degree turn.

Please, for the sake of your loved ones, don't post anymore.

[pacman1]

oldsoak said:

pacman1 said:

The 270 deg brigade are taking the start point as 0 deg.
Oldsoak is taking his (did he but know it) at +180.
What would the satnav say?

Wrong again fella ...keep trying though. Once you acknowledge the idea that a car has not got a spike through it into the ground and only turns on that spike you'll get the rest...honest you will.

You are bending the maths!

julian64 said:

pacman1 said:

The 270 deg brigade are taking the start point as 0 deg.
Oldsoak is taking his (did he but know it) at +180.
What would the satnav say?

According to you if you drive straight across a roundabout never moving the steering wheel, you have actually done a 180 degree turn.

You have already rotated 180 deg relative to the roundabout in order to be travelling towards the roundabout. Straight on, relative to any roundabout you approach will always give you a +180 degree start point.

Edited by pacman1 on Friday 27th November 16:13

[Greenpis]

julian64 said:

Honestly, the internet lives forever. Do you really want your children, and your childrens children seeing this thread and realising the state of their grandfathers education?

Please, for the sake of your loved ones, don't post anymore.

I love this quote. It should be on the first page of every internet forum. Could also be used in normal life situations off the internet.

Inspiring.

[oldsoak]

pacman1 said:

oldsoak said:

pacman1 said:

The 270 deg brigade are taking the start point as 0 deg.
Oldsoak is taking his (did he but know it) at +180.
What would the satnav say?

Wrong again fella ...keep trying though. Once you acknowledge the idea that a car has not got a spike through it into the ground and only turns on that spike you'll get the rest...honest you will.

You are bending the maths!

I take by that, you have just realised how deep that hole you are in has gotten.