The A1175 road is a public highway in south-west Lincolnshire, England within the United Kingdom.
The A1175 starts near the town of Stamford and links to the A16 at Spalding. On route, the road briefly multiplexes with the A15 at Market Deeping.
It was previously designated as the southern section of the A16, but is now classified as the A1175 in following the completion of the new Peterborough to Spalding A16 section. The renaming also included a short section of A43 from the Stamford Bypass (A1) into Stamford.
At one time the section from Stamford to Market Deeping was designated part of the A43. The new designation does not regard the route as a trunk.
The A1175 starts as a single carriageway at the A43 junction with the A1 Stamford Bypass at TF022054, and follows Kettering Road into Stamford to the Junction in St Martins. It turns North as High St. St. Martins, passes over the town bridge (and the River Welland) and turns east along Wharf Road, Ryhall road, and Uffington Road. As Uffington road it crosses the River Gwash and leaves Stamford at Newstead Mill,TF047078.
Still a single carriageway the A1175 passes through the villages of Uffington and Tallington. At Tallington level crossing (TF095085) it is crossed on the level by the main London-Edinburgh railway line. The frequency of the trains often causes long delays here. After many years, there are at last plans for a solution. Continuing in a roughly easterly direction the road passes Tallington lakes. The road formeed the southern limit of the gravel workings from which the lakes were developed. The road skirts the northern edge of West Deeping where it is crossed at TF109093 by King Street (Roman road).
This section ends at the roundabout on the Deeping Bypass at TF129098
The route turns left onto the dual carriageway Deeping Bypass, sharing the road with the A15 Peterborough to Bourne highway, as far as the roundabout for Bourne Road to the north of Market Deeping at TF131112. From here the A15 departs northwards, and the A1175 heads east, reverting to single carriageway, having the bypass to itself. At TF135114 it crosses the Roman Car Dyke, two examples of civil engineering built nearly two millennia apart.
The dual carriageway ends at TF171127 having bypassed Market Deeping and Deeping St James.
Before the Deeping Bypass was built this road went through Market Deeping and Deeping St James. This route is now known as the B1525. The Deeping Bypass was opened in July 1998, and the whole works, A15 and former A16, cost £10 million.
The whole extraparochial area to the west of Deeping St James was known as Littleworth, and hence the road as Littleworth Drove. But after successful drainage of Deeping Fen in the 18th and 19th century, the village of Deeping St Nicholas was created, and that portion of the road became High Street, Deeping St Nicholas, before reverting to the Littleworth name again at the other end of the village.
The A1175 then, whatever it might be called, leaves the Deeping bypass, still as single carriageway, and passes through the villages of Hop Pole, and Deeping St Nicholas, before crossing the Peterborough-Spalding railway line on an oblique level crossing at the former Littleworth railway station at TF208152. The route the continues roughly North East past isolated farmhouses until the end of Deeping fen at the North Drove Drain, TF233189.
Cowbit is a village a short distance away on the former A1073 Spalding-Peterborough road. Cowbit wash is a low-lying area around the Welland designed to be flooded to protect Spalding. The road crosses this area at its Northern extent.
There is a bridge at TF233189 over the minor North Drove Drain, the road skirts south of the hamlet of Bridge House (named for a defunct public house on the road) and crosses another bridge at TF237192 over the main course of the River Welland. Within a short distance there is another bridge over the New River (an artificial course of the Welland) at TF242194 where there is also a small roundabout.
The small Roundabout marks the crossing with the former A1073 Spalding-Peterborough road, since replaced by the new road which has taken the A16 designation. The former route is truncated to the north, but is still extant to the south as a minor road.
The A1175 continues north-east for around 200m more to its end at the Roundabout at TF245196, where the A16 Spalding Bypass and A16 Spalding-Peterborough meet the B1173 local road into Spalding.
From Stamford to Uffington the route lies across the gently rolling hills of Upper Lincolnshire limestone, save where the Gwash has cut a valley down the Lower Lincolnshire Limestone. After Uffington, through Tallington to the end of the Deeping bypass at Littleworth, the terrain is flatter, described as river terrace sands and gravels overlying the mudstones of the Kellaway and Oxford clay formations. From Hop Pole onwards, Deeping Fen is formed of tidal zone deposits less than 2 million years old, over the same Oxford clays. This is the true fen, once brackish marsh until drained between the 16th and 19th centuries. At Stamford the road is close to the 50m contour, falling to 22m at Uffington, 11m at West Deeping, and with spotheights of 2m or 3m across Deeping fen to the A16, rising only to cross the Welland Bridge.
The route roughly follows the route of the River Welland from Stamford to Spalding, and actually crosses it near either end, in Stamford and on the Cowbit Washes.