Question: Which road is situated just west of the Derbyshire/Cheshire county boundary and is extremely popular with motorcyclists?

Context paragraphs:
Breedon on the Hill: Breedon on the Hill is a village and civil parish about 5 mi north of Ashby-de-la-Zouch in North West Leicestershire, England.  The parish adjoins the Derbyshire county boundary and the village is only about 2 mi south of the Derbyshire town of Melbourne.  The 2001 Census recorded a parish population (including Isley and Wilson) of 958 people in 404 households.  The parish includes the hamlets of Tonge 1 mi east of the village and Wilson 1.3 mi north of the village on the county boundary.  The population at the 2011 census (including Isley cum Langley and Langley Priory) was 1,029 in 450 households.

Cat and Fiddle Road: The Cat and Fiddle is a road in England between Buxton, Derbyshire, and Macclesfield, Cheshire, named after the Cat and Fiddle Inn public house at its summit.  Formed by parts of the A537, A54 and A53, it is famous for its scenic views across the Greater Manchester conurbation, the Peak District National Park and the Cheshire Plain, and for its many bends.  It is extremely popular with motorcyclists, and is often classed as the most dangerous road in the UK.

River Etherow: The River Etherow is a river in northern England, and a tributary of the River Goyt.  Although now passing through South Yorkshire, Derbyshire and Greater Manchester, it historically formed the ancient county boundary between Cheshire and Derbyshire.  The upper valley is known as Longdendale.  The river has a watershed of approximately 30 sqmi , and the area an annual rainfall of 52.5 in .

Newtown, Derbyshire: Newtown is an area of the town of New Mills in the High Peak borough of Derbyshire, England.  It is situated west of New Mills proper, on the road to Disley.  The county boundary between Cheshire and Derbyshire divides the area between the two counties.  It entirely originally formed part of the parish of Disley and the county of Cheshire, and most of it became part of Derbyshire under the Local Government Act 1888 and a separate civil parish under the name 'Newtown'.  The civil parish survived until 1934 when it was added to New Mills parish.

Cat and Fiddle Inn: The Cat and Fiddle Inn is the second-highest inn or public house in England (the Tan Hill Inn being the highest).  The inn is situated on the eastern fringes of Cheshire in the Peak District National Park on the A537 road just west of the Derbyshire/Cheshire county boundary, on the western side of Axe Edge Moor.  It is at an elevation of 1689 ft above sea level (although a measurement commissioned by a former landlord suggested a figure of 1772 ft , which would surpass that of the Tan Hill Inn).  The Ordnance Survey have fixed an accurately measured flush-bracket benchmark to the front wall of the pub.  The height of this flush bracket is 515.1984 m , and the flush bracket is 0.4 m above the ground level, which casts doubt over the validity of the private survey.

Buxton: Buxton is a spa town in Derbyshire, England.  It has the highest elevation – about 960 ft above sea level – of any market town in England.  Close to the county boundary with Cheshire to the west and Staffordshire to the south, Buxton is described as "the gateway to the Peak District National Park".  A municipal borough until 1974, Buxton was then merged with other localities lying primarily to the north, including Glossop, to form the local government district and borough of High Peak within the county of Derbyshire.  Economically, Buxton is within the sphere of influence of Greater Manchester.  The population of the town was 22,115 at the 2011 Census.

Limestone Way: The Limestone Way is a long-distance footpath in Derbyshire, England.  It runs through the White Peak of the Peak District National Park, from Castleton south east to Rocester over the county boundary in Staffordshire.  It originally ran to Matlock, but was diverted to its current, longer route to join up with the Staffordshire Way.  The trail is named for the limestone scenery along its route.  It was created by the West Derbyshire District Council (now Derbyshire Dales).

The Royal Cheshire County Show: The Royal Cheshire County Show (simply referred to as 'Royal Cheshire County Show' and 'Royal Cheshire Show', and formerly Cheshire County Show) is a big county agricultural show that is held on two days in June each year on land west of Flittogate Lane in the Tabley area in Cheshire, England.  The show is organised by the Cheshire Agricultural Society, and marked its 175th anniversary in 2013 with 80,000 visitors expected.  In January 2016, it became The Royal Cheshire County Show.

Charlwood: Charlwood is a village and civil parish in the Mole Valley district of Surrey, England.  It is immediately northwest of London Gatwick Airport in West Sussex, close west of Horley and north of Crawley.  The historic county boundary between Surrey and Sussex ran to the south of Gatwick Airport.  Boundaries were reformed in 1974 so that the county boundary between Surrey and West Sussex, delineated by the Sussex Border Path, now runs along the northern perimeter of the airport, and the southern extent of Charlwood.

Disley: Disley is a village and civil parish in the unitary authority of Cheshire East and the ceremonial county of Cheshire, England.  It is located on the very edge of the Peak District, in the Goyt Valley, very close to the county boundary with Derbyshire at New Mills, and south of Stockport, Greater Manchester.  The population of the civil parish as taken at the 2011 Census was 4,294.  To the north of the village, the River Goyt and the Peak Forest Canal, which opened in 1800, passes along the edge of the village.  Today it is a dormitory village retaining a semi-rural character.

Supporting paragraphs: Cat and Fiddle Road Cat and Fiddle Inn
Answer: A537