The R158 road is a regional road

Regional road

A regional road in Ireland is a class of road not forming a major route , but nevertheless forming a link in the national route network. There are over 11,600 kilometres of regional roads. Regional roads are numbered with three digit route numbers, prefixed by "R" A regional road in Ireland is a...

 in Ireland

Republic of Ireland

Ireland , described as the Republic of Ireland , is a sovereign state in Europe occupying approximately five-sixths of the island of the same name. Its capital is Dublin. Ireland, which had a population of 4.58 million in 2011, is a constitutional republic governed as a parliamentary democracy,...

, linking Trim

Trim, County Meath

Trim is the traditional county town of County Meath in Ireland, although the county town is now Navan. The town was recorded in the 2006 census to have a population of 6,870....

 in County Meath

County Meath

County Meath is a county in Ireland. It is part of the Mid-East Region and is also located in the province of Leinster. It is named after the ancient Kingdom of Mide . Meath County Council is the local authority for the county...

 to Kilcock

Kilcock

Kilcock or Killcock is a town and townland in the north of County Kildare, Ireland, on the border with County Meath. Kilcock is a dormitory town for many of those who work in Dublin...

 in County Kildare

County Kildare

County Kildare is a county in Ireland. It is part of the Mid-East Region and is also located in the province of Leinster. It is named after the town of Kildare. Kildare County Council is the local authority for the county...

. The road, which is single-carriageway

Single carriageway

A single carriageway is a road with 1, 2 or more lanes arranged within a single carriageway with no central reservation to separate opposing flows of traffic. Two-lane road or two-lane highway are single carriageway with one lane for each direction...

 throughout, has been extensively realigned in recent years at a cost of €22m, the section between Kilcock and Summerhill having been completed by Fallon Construction in August 2008.

Route

The road runs in a south-southeasterly direction from a junction with the R161 in Trim

Trim, County Meath

Trim is the traditional county town of County Meath in Ireland, although the county town is now Navan. The town was recorded in the 2006 census to have a population of 6,870....

 by way of Summerhill

Summerhill, County Meath

Summerhill is a village in County Meath, Ireland. It is located at the intersection of the R156 and R158 regional roads. The Irish version of the town's name means "Lynch's Hill", and it was the ancestral home of the Norman-Irish Lynch family, whence came the Galway merchant family of the same...

 to a junction with the R148

R148 road

The R148 road is one of Ireland's regional roads which was classified following the opening of a by-passed national primary road.The section of the old N4 which has been by-passed by the M4 motorway was reclassified R148. The R148 runs from Dublin to Kinnegad in County Westmeath.The road is long...

 in Kilcock

Kilcock

Kilcock or Killcock is a town and townland in the north of County Kildare, Ireland, on the border with County Meath. Kilcock is a dormitory town for many of those who work in Dublin...

.