National speed limits

dar1976:
Just read Collins English Definition.

You’ll laugh.

collinsdictionary.com/dictio … arriageway

Copied from the HC.

Single carriageway

135

Where a single carriageway has three lanes and the road markings or signs do not give priority to traffic in either direction

use the middle lane only for overtaking or turning right. Remember, you have no more right to use the middle lane than a driver coming from the opposite direction do not use the right-hand lane.

136

Where a single carriageway has four or more lanes, use only the lanes that signs or markings indicate.

Dual carriageways

A dual carriageway is a road which has a central reservation to separate the carriageways.

137

On a two-lane dual carriageway you should stay in the left-hand lane. Use the right-hand lane for overtaking or turning right. After overtaking, move back to the left-hand lane when it is safe to do so.

138

On a three-lane dual carriageway, you may use the middle lane or the right-hand lane to overtake but return to the middle and then the left-hand lane when it is safe.

a single carriageway can have more than 1 lane…like in the picture posted by shuttlespanker.
the a556 off m6 j19 is the same as this…and regularly catches truck drivers out

Luke222:
Might be a really dumb question but I’ve had a few beers so makes perfect sense in my head but…

Can a speed camera tell the difference between a wagon and a car so say the speed limit is 60 national and I come past in my artic on the limiter, where for me the limit should be 50, will I get flashed??

Depends on a few things. If the camera is set to only take a photo over a certain speed then you should be OK as you say.

However the more modern stuff will record every vehicle which passes and make a decision based on a lookup on the plate, so once you have the reg number you can tell what vehicle it is, what it may weigh etc.

So while it might be OK, that isn’t the case for all types of camera.

commonrail:
a single carriageway can have more than 1 lane…like in the 2nd picture posted by shuttlespanker.
the a556 off m6 j19 is the same as this…and regularly catches truck drivers out

FTFY :wink:

shuttlespanker:

commonrail:
a single carriageway can have more than 1 lane…like in the 2nd picture posted by shuttlespanker.
the a556 off m6 j19 is the same as this…and regularly catches truck drivers out

FTFY :wink:

Nope… You’ve lost me.

DC - carriageways separated by a physical barrier. Perhaps I need specsavers but that looks like a raised area with trees etc

Oh hang on I’m getting pics confused lol.

1st pic is DC

2nd pic is SC with multiple lanes.

commonrail:
a single carriageway can have more than 1 lane…like in the picture posted by shuttlespanker.
the a556 off m6 j19 is the same as this…and regularly catches truck drivers out

Yes I know. No physical barrier - SC

Question then.

If a Motorway didn’t have any blue signs, what would define it as a Motorway over a 3(+) lane DC?

I’m thinking about the possibilities of a colour blind dyslexic driver

go on…i give in

dar1976:
If a Motorway didn’t have any blue signs, what would define it as a Motorway over a 3(+) lane DC?

The fact it had a hard shoulder is all I can think of although they’re not exclusive to motorways they are a requirement on them.

A DC can have roundabouts and traffic lights and turnings through the central divide, none of these on MW.

dar1976:
Question then.

If a Motorway didn’t have any blue signs, what would define it as a Motorway over a 3(+) lane DC?

I’m thinking about the possibilities of a colour blind dyslexic driver

the A38(M) Aston Expressway from Junction 6 of the M6 in towards Birmingham is technically classed as a motorway, but, it has no hard shoulder or central reservation

Actually it does have a central reservation (they always leave one lane unused) - but no physical barriers or kerbs because its position is not fixed.

And there are a couple of roundabouts on Motorways - M50/M5 junction for example and also a couple of places where there are traffic lights on motorways too.

Roymondo:
Actually it does have a central reservation (they always leave one lane unused) - but no physical barriers or kerbs because its position is not fixed.

And there are a couple of roundabouts on Motorways - M50/M5 junction for example and also a couple of places where there are traffic lights on motorways too.

so, it is not a central reservation, as the unused lane alters depending on volumes of traffic in each direction, a central reservation is just that, a fixed ‘division’ between the different carriageways

commonrail:
go on…i give in

It was a genuine question for discussion as I had no idea. :slight_smile:

that’s just it Dar, a motorway does have blue signs

there are sections of motorway without a hard shoulder, but, they all have blue signs

if they are green, that is an A road, not a motorway

shuttlespanker:
that’s just it Dar, a motorway does have blue signs

there are sections of motorway without a hard shoulder, but, they all have blue signs

if they are green, that is an A road, not a motorway

So colour blind dyslexics are stuffed then? :slight_smile:.

As I said it was just a question for discussion. Those in the know might have had an answer I hadn’t thought of and I’m surprised ROG hasn’t lol.

shuttlespanker:
the A38(M) Aston Expressway from Junction 6 of the M6 in towards Birmingham is technically classed as a motorway, but, it has no hard shoulder or central reservation

I’d overlooked that one but I’d say generally motorways have hard shoulders although the only definitive factor is the blue sign.

A601(M) off J35 on the M6 is also a motorway, however from the motorway junction east towards the Kellet Quarries it is only a SC with 1 lane each direction and no hard shoulder, quite often see cyclists and learner drivers go down even though quite clearly signed as under motorway regs

Luke222:
Might be a really dumb question but I’ve had a few beers so makes perfect sense in my head but…

Can a speed camera tell the difference between a wagon and a car so say the speed limit is 60 national and I come past in my artic on the limiter, where for me the limit should be 50, will I get flashed??

some cameras are becoming sly ■■■■■■■■ and will weigh you and clock you however the old gatso and truvelo type wont as they calculate speed over a given distance and time - if you go over a set distance greater than a set time your speeding and if you dont your not but like i say the older cameras arent that intelligent yet