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Highway Code - Small Test

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Bubbs
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PostPosted: 10:51 - 09 Oct 2013    Post subject: Highway Code - Small Test Reply with quote

So I got a speeding conviction and chose to do the dreaded 4 hour course... it was mostly boring, but did teach me 3-4 things that I didn't know.

So I want to see if I am alone in this gap in knowledge, or are there others? (Could save you 3 Points)



Q1. The image below shows a picture of a road and a National Speed Limit sign. Your driving the car that the picture was taken from... What is the maximum speed for:
(This was the road I got caught on twice in 1 week)

a) A car/motorcycle 60mph
b) A lorry 40MPH

https://cdn.bikechatforums.com/files/carriageway.jpg

Q2. In the image below you will see another National Speed Limit Road... What is the maximum speed? 70MPH

https://cdn.bikechatforums.com/files/single2carriageway.jpg

Q3. Again below is another National Speed Limit road.. How fast is the lorry allowed do drive? 40MPH

https://cdn.bikechatforums.com/files/lorry.jpg

Q4. The image below shows a car stopping at 30mph, 35mph, and 40mph.

Can you tell me the speed at point B at 35mph and the speed at point B for 40mph?
First one is: 18MPH second one is 26MPH

https://cdn.bikechatforums.com/files/stopping-distances-and-kinetic-energy.jpg
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Last edited by Bubbs on 13:30 - 09 Oct 2013; edited 3 times in total
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Derivative
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PostPosted: 10:55 - 09 Oct 2013    Post subject: Reply with quote

Let's have a see here...

Q1: Car/motorcycle 60mph, lorry 40mph

Q2: Car/motorcycle 70, lorry 50(?)

Q3: Lorry can travel 40mph

Q4: 35mph - 25mph - 0 mph
40 mph - 35mph - 0mph

edit: Had a check, can't do the last one, but I think the rest are right? https://www.gov.uk/speed-limits

Assuming the lorry is >7.5ton.

Also this 'Your driving the car that the picture was taken from...' could be some sort of daft trick. I.e. in picture 1 you could be in a 40 zone that turns into a 60, so you shouldn't be going that fast until passing the sign, but then it'd be a hard guess...
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stinkwheel
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PostPosted: 11:02 - 09 Oct 2013    Post subject: Reply with quote

Q1) Unrestricted highway. a) 60mph b) 40mph.

Q2) Unrestricted highway 60mph

Q3) Unrestricted Highway. 40mph

Q4) No, because there is no context to your question. What does point B represent?
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Derivative
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PostPosted: 11:10 - 09 Oct 2013    Post subject: Reply with quote

stinkwheel wrote:
What does point B represent?


The point at which you would have been stationary if you braked from 30mph.
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Bubbs
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PostPosted: 11:14 - 09 Oct 2013    Post subject: Reply with quote

stinkwheel wrote:

Q4) No, because there is no context to your question. What does point B represent?


Point B is the point at which you would have stopped going 30mph.

EDIT: What derivative said
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stinkwheel
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PostPosted: 11:16 - 09 Oct 2013    Post subject: Reply with quote

Derivative wrote:
stinkwheel wrote:
What does point B represent?


The point at which you would have been stationary if you braked from 30mph.


In which case my answer is still no. I don't know. Nor do I feel any need to know because I always drive at a speed where I can stop within the distance I can see.

EDIT: Anyway. I thought this was supposed to be a highway code test? I don't recall any such thing being part of the highway code. Surely that diagram is pure speed nazi propoganda superimposed on the highway code thinking and stopping distance diagrams?
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Bubbs
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PostPosted: 11:20 - 09 Oct 2013    Post subject: Reply with quote

stinkwheel wrote:
In which case my answer is still no. I don't know. Nor do I feel any need to know because I always drive at a speed where I can stop within the distance I can see.


Ha ha... My logic was that if you stop from 30mph at point b...then any additional speed would be the remainder...

So at 35mph you would still be carrying 5mph of speed.

Anyone else agree with this??
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DrSnoosnoo
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PostPosted: 11:24 - 09 Oct 2013    Post subject: Reply with quote

I always thought single lane national speed limit is 60
double lane national speed limit (Dual carriageway) 70
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Derivative
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PostPosted: 11:27 - 09 Oct 2013    Post subject: Reply with quote

Bubbs wrote:
Ha ha... My logic was that if you stop from 30mph at point b...then any additional speed would be the remainder...

So at 35mph you would still be carrying 5mph of speed.

Anyone else agree with this??


No.

Think about the extreme case. If you can stop from 30mph in, say, 20 metres - do you think you could reduce from 100mph to 70mph in the same distance?

Thinking in a time basis is probably better. If it takes 1 second to do 30-0 (and we pretend it's then 1 second to do 100-70), then you've travelled 30 metres in 1 second at 70mph while also bleeding off the additional 30mph.

5mph is the lower bound. You will certainly be traveling faster than that.
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Bubbs
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PostPosted: 11:29 - 09 Oct 2013    Post subject: Reply with quote

Derivative wrote:
Bubbs wrote:
Ha ha... My logic was that if you stop from 30mph at point b...then any additional speed would be the remainder...

So at 35mph you would still be carrying 5mph of speed.

Anyone else agree with this??


No.

Think about the extreme case. If you can stop from 30mph in, say, 20 metres - do you think you could reduce from 100mph to 70mph in the same distance?


I know what the answer is now but this is what made sense to me yesterday before it was explained.
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Bubbs
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PostPosted: 11:29 - 09 Oct 2013    Post subject: Reply with quote

snoosnoo wrote:
I always thought single lane national speed limit is 60
double lane national speed limit (Dual carriageway) 70


This is what I was taught.... Wrong im afraid.
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Derivative
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PostPosted: 11:31 - 09 Oct 2013    Post subject: Reply with quote

Bubbs wrote:
snoosnoo wrote:
I always thought single lane national speed limit is 60
double lane national speed limit (Dual carriageway) 70


This is what I was taught.... Wrong im afraid.


Are you sure?

Single lane meaning no central reservation.
Double lane meaning there is a central reservation.

So not '2 lanes per direction of travel', but two physically seperated roads.

The grass one is just daft because sensibly it's not actually a central reservation and wouldn't really stop anyone colliding head on.
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Ol
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PostPosted: 11:35 - 09 Oct 2013    Post subject: Re: Highway Code - Small Test Reply with quote

Bubbs wrote:
A = 60 - it's a NSL but both carriageways are together so not a dual carriageway
B = up to 7.5T it's a 50mph limit, over 7.5T it's a 40mph Limit


Bubbs wrote:
Q2. In the image below you will see another National Speed Limit Road... What is the maximum speed?

https://cdn.bikechatforums.com/files/single2carriageway.jpg
70MPH - the carriagways are seperated by an immovable object - so it is a "Dual" Carriageway - so its a 70mph limit

Bubbs wrote:
Q3. Again below is another National Speed Limit road.. How fast is the lorry allowed do drive?

https://cdn.bikechatforums.com/files/lorry.jpg
up to 7.5T it's a 50mph limit, over 7.5T it's a 40mph Limit

i'm shit at braking distances but at a guess id say about 20 MPH??
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mrdelmonti
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PostPosted: 11:37 - 09 Oct 2013    Post subject: Reply with quote

Bubbs wrote:
snoosnoo wrote:
I always thought single lane national speed limit is 60
double lane national speed limit (Dual carriageway) 70


This is what I was taught.... Wrong im afraid.


But only because he doesn't have the correct definition of dual carriageway.

A dual carriageway can have any number of lanes but has a barrier, be that land or regular metal barrier, that seperates the lanes travelling in your direction from the lanes travelling in the opposing direction.
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supZ
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PostPosted: 11:37 - 09 Oct 2013    Post subject: Reply with quote

snoosnoo wrote:
I always thought single lane national speed limit is 60
double lane national speed limit (Dual carriageway) 70


the definition of a dual carriageway is where one side is separated from the other (by a hedge/barrier/curb etc..) so you have 2/dual carriageways.

the amount of lanes going in any direction is irrelevant Smile

so yes, you can have a single lane road with a speed limit of 70 if the oncoming lane is separated by some kind of barrier.
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Tungtvann
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PostPosted: 11:40 - 09 Oct 2013    Post subject: Reply with quote

I don't drive a truck, so my answer is 60 mph.
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stinkwheel
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PostPosted: 11:40 - 09 Oct 2013    Post subject: Re: Highway Code - Small Test Reply with quote

Ol wrote:

https://cdn.bikechatforums.com/files/single2carriageway.jpg70MPH - the carriagways are seperated by an immovable object - so it is a "Dual" Carriageway - so its a 70mph limit


Of course the signage has been tampered with. I presume the blanked-out sign under the keep left says either "dual carriageway" or "single carriageway" thereby converting a valid question into a (at least in part) trick question. If it was done by OP, bad show. If it was done by the safetynazi, rage. Trick questions have no part in anything other than pub quizzes.
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I did the 2010 Round Britain Rally on my 350 Bullet. 89 landmarks, 3 months, 9,500 miles.
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Rogerborg
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PostPosted: 11:41 - 09 Oct 2013    Post subject: Reply with quote

Did you check the "correct" answers against both the Highway Code and the underlying statues and regulations?

Should I ever have the pleasure of doing a Kitten Kourse, I shall take great pleasure in having all the relevant laws to hand (or to phablet).
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stinkwheel
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PostPosted: 11:47 - 09 Oct 2013    Post subject: Reply with quote

supZ wrote:

the definition of a dual carriageway is where one side is separated from the other (by a hedge/barrier/curb etc..) so you have 2/dual carriageways.

the amount of lanes going in any direction is irrelevant Smile

so yes, you can have a single lane road with a speed limit of 70 if the oncoming lane is separated by some kind of barrier.


You got chapter and verse on that?

Reason I ask is that I can think of at least one example of a road in the UK which has a total of seven lanes in a continuous row with no gap or barrier at all, three one way, three the other and the central one being "tidal" in a variable direction. It is a 70 limit.
https://i3.birminghammail.co.uk/incoming/article1294911.ece/ALTERNATES/s615/astonexpressway-1294911.jpg
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“Rule one: Always stick around for one more drink. That's when things happen. That's when you find out everything you want to know.
I did the 2010 Round Britain Rally on my 350 Bullet. 89 landmarks, 3 months, 9,500 miles.
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Bubbs
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PostPosted: 11:48 - 09 Oct 2013    Post subject: Reply with quote

Rogerborg wrote:
Did you check the "correct" answers against both the Highway Code and the underlying statues and regulations?

Should I ever have the pleasure of doing a Kitten Kourse, I shall take great pleasure in having all the relevant laws to hand (or to phablet).


Mr Borg.. no I did not have all those to hand... and you could well have the most up to date and correct info. I was purely going off what I was shown yesterday.
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Derivative
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PostPosted: 11:51 - 09 Oct 2013    Post subject: Reply with quote

stinkwheel wrote:
It is a 70 limit.


Are you sure? I thought it was a 50. Google-fu backs me up on this as well.

I'm well aware that no-one actually obeys this 'limit' though. Very Happy
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jowettdriver
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PostPosted: 11:56 - 09 Oct 2013    Post subject: Reply with quote

stinkwheel wrote:
supZ wrote:

the definition of a dual carriageway is where one side is separated from the other (by a hedge/barrier/curb etc..) so you have 2/dual carriageways.

the amount of lanes going in any direction is irrelevant Smile

so yes, you can have a single lane road with a speed limit of 70 if the oncoming lane is separated by some kind of barrier.


You got chapter and verse on that?

Reason I ask is that I can think of at least one example of a road in the UK which has a total of seven lanes in a continuous row with no gap or barrier at all, three one way, three the other and the central one being "tidal" in a variable direction. It is a 70 limit.
https://i3.birminghammail.co.uk/incoming/article1294911.ece/ALTERNATES/s615/astonexpressway-1294911.jpg


I mentioned this at the course I went too and was told that the definitions of a dual carriageway and the speed limits applied are different for motorways which work under a different set of rules.

Cheers Tim.
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stinkwheel
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PostPosted: 11:59 - 09 Oct 2013    Post subject: Reply with quote

Where is your god now?

What limit? Who has priority in the middle lane?

It's a real road
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I did the 2010 Round Britain Rally on my 350 Bullet. 89 landmarks, 3 months, 9,500 miles.
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Doovy
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PostPosted: 11:59 - 09 Oct 2013    Post subject: Reply with quote

I mentioned the central reservation on my course too, and I was the only one that got it right on that particular example.

No-one else had even heard of it Rolling Eyes
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Rogerborg
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PostPosted: 12:04 - 09 Oct 2013    Post subject: Reply with quote

Bubbs wrote:
I was purely going off what I was shown yesterday.

My point was: is what you were told correct?

From what you've shown, I'd go with:

1. 60 / 40
2. 70 / 50
3. 60 / 40

4.1 35 mph = about 20mph at point B
4.2 40 mph = about 30mph at point B

I'm not going to go more exact than that because it's not exact physics.
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