|Distance:||31 km (19.3 miles)|
|Met:||T14, T5, T36|
|Now part of:||R423, unclassified, R440, R430|
The first section of this route appears to now be unclassified, with the R423 meeting the N80 (former T14) further south. After that, the L147 followed the modern R423 through Ballyfin to Knocks, where again it took to the now unclassified route further west. This saw it enter Mountrath on the current R440. From Mountrath to Abbeyleix, the road is now entirely the R430.
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