The R466 road is a regional road in Ireland which runs southeast-northwest from the R445 at Birdhill, County Tipperary to the R352 in East Clare. After leaving the R445 at Birdhill it passes through Montpelier before crossing the River Shannon at O'Briensbridge in County Clare via a narrow 14-arch bridge. It veers northwest for the rest of the route, passing through Broadford and O'Callaghans mills before terminating at a junction with the R352. The route is long. See also Roads in Ireland National primary road National secondary road References Roads Act 1993 (Classification of Regional Roads) Order 2006 – Department of Transport Regional roads in the Republic of Ireland Roads in County Tipperary Roads in County Limerick Roads in County Clare