A66
In short
The A66 is a major trunk road in North West England that connects the M6 motorway near Penrith to the A191 near Teesside.
In plain words
It is a primary route used by lorries and travellers moving through the Lake District. The road passes through difficult hilly terrain and is vital for local transport.
A simple example
A driver travelling from Middlesbrough to Kendal would use the A66 to cross the Pennines.
Why it matters
It provides a key link between the North East and the North West. Improving the road helps reduce traffic jams in national parks and boosts the local economy.
Easy to mix up
Do not confuse it with the A6, which is a different long-distance road running through similar northern counties.