N70 is mostly of poor quality single carriageway road, with many sections are bending or narrow especially from Castlemaine to Tralee and also from Waterville to Kenmare.
Upgrade and Improvement
In 2013, a new 750m of dual carriageway near Tralee was opening joining at roundabout at N22, as part of new 8 km dual carriageway east Tralee bypass which also joined N21 and N69.
In 2019, a new 3.5 km road between Milltown and Killorglin was opened. The new road is widened with a climbing lane. It replaced the dangerous bends on old section from Knockavota to Tinnahally.[1]