the n83 road is a national secondary road in ireland that runs (north to south) from its junction with the n17 just south of ireland west airport knock in county mayo to a point just north of tuam, county galway where it rejoins the n17. on 27 september 2017, the old n17 from the kilmore roundabout in tuam to the junction with the n6 in galway city was redesignated as the n83.