dotted white lines

boatman

What do these white dotted lines indicate, what rules are there regarding them?

SoftCentaur

I think it is just a guide line for the traffic on the main road not to drift left and into the minor road.

NCC1701-A

I believe reversing from a minor road onto a major road is not allowed, the dots delineate the minor and major road. There are sometimes different speed limits between major and minor roads too.

Car_54

SoftCentaur said:

I think it is just a guide line for the traffic on the main road not to drift left and into the minor road.

Exactly. "Edge of main carriageway".

See "Know Your Traffic Signs", which is required for the driving tests!

boatman

Car_54 said:

SoftCentaur said:

I think it is just a guide line for the traffic on the main road not to drift left and into the minor road.

Exactly. "Edge of main carriageway".

See "Know Your Traffic Signs", which is required for the driving tests!

So which rule is that?

Sandtree

The highway code Road markings (publishing.service.gov.uk) doesnt have them listed... I've always assumed that they are demarking the edge of the main carriageway/start of the side road and so are purely for practical purposes

Car_54

boatman said:

Car_54 said:

SoftCentaur said:

I think it is just a guide line for the traffic on the main road not to drift left and into the minor road.

Exactly. "Edge of main carriageway".

See "Know Your Traffic Signs", which is required for the driving tests!

So which rule is that?

It's part of the syllabus for the theory test, along with the Highway Code and Driving - the Essential Skills. https://www.gov.uk/theory-test/revision-and-practice?step-by-step-nav=e01e924b-9c7c-4c71-8241-66a575c2f61f

boatman

Sandtree said:

The highway code Road markings (publishing.service.gov.uk) doesnt have them listed... I've always assumed that they are demarking the edge of the main carriageway/start of the side road and so are purely for practical purposes

This was really my reason for asking, because it doesn't seem to specifically mention them. It talks about the double dotted at the junction, single dotted in the middle of the road and about their use as markings for parking spaces for example. But nothing specific.

I was wondering if there were rules or advice about crossing them? Because there don't appear to be any..

Jenni_D

What does the single dotted (dashed) lines mean when used in the middle of a carriageway?  

born_again

Well as it's clearly a junction you are highlighting. 
Which side of the road do we drive on?

So if coming up to a junction, you should not be crossing the single lines as you would be on the wrong side of the road.

Same as when you turn into a junction you cross over the single dotted lines (as highlighted) and not the double ones.

Jenni_D

born_again said:

Well as it's clearly a junction you are highlighting. 
Which side of the road do we drive on?

So if coming up to a junction, you should not be crossing the single lines as you would be on the wrong side of the road.

Same as when you turn into a junction you cross over the single dotted lines (as highlighted) and not the double ones.

With respect, that's not the question asked. OP is asking what function the single row of lines serve