R449 road (Ireland)
The R449 road is a regional road in County Kildare, Ireland. It is just 3 km (1.9 mi) long and was completed in 2003 as part of the construction of a grade separated interchange to connect both West Leixlip and North Celbridge to the M4 motorway. This junction currently designated 2a.
The 2 km section between Leixlip and the M4 is dual-carriageway. The speed limit along this section is 60 km/h, despite joining an 80 km/h road with 120 km/h road, via a dual carriageway.