After driving up North and seeing the same A road numbers cropping up all over the place, I wondered which road was the longest? Measured by the extremeties of the road number, so doesn’t necessarily have to be continuous.

I then wondered what would be the fewest number of different road numbers you’d need to get from Land’s End to John O’Groats. I know the A38 takes you all the way from Cornwall up to the Midlands.

A1 – london to edinburgh?

IIRC it’s the A6?

(edit: the A1 is dis-continuous)

The A1 is a motorway in places – so maybe not strictly an A road?

The A1?

London to Edinburgh. Not sure if any of it’s classified as motorway though.

I always thought it was the A6.

A9? Falkirk area to the top of Scotland.

E15?

Interesting (if that’s what floats your boat) road facts:

http://www.sabre-roads.org.uk/wiki/index.php?title=Road_Facts_and_Figures

A30, A38, A60, A1 gets you all the way to Edinburgh more or less, with a few tiny gaps.

A9 then from almost Edinburgh the rest of the way there.

Longest unbroken stretch of single carraigeway?

A1 gets you all the way to Edinburgh more or less, with a few tiny gaps.

Just in the NE there’s some substantial gaps now, it’s motorway from Ferrybridge to Leeming and Scotch Corner [ish] to Washington

I think the A1(M) counts as the A1

Yes, I think the A9 has it. 266 miles from Polmont to Stirling.

The A6 is 116 from Manchester to Carlisle. The A1 has motorway gaps.

I think the A1(M) counts as the A1

If you want to count the Motorway sections, there’s no gaps that I know of

A38 is 292 miles according to Wikipedia

A6 is 286 miles from Luton to Carlisle