Probably a good idea not to drive. The Kerry roads are notorious, with hairpin bends.
I well remember a long-ago cycling holiday with my teenage son. At one stage, as we cycled along a narrow mountain road, an articulated truck coming towards us started blaring its horn.
I was wondering what was wrong with the eejit - until another artic, racing up behind us, passed both us and the other truck at full speed, its slipstream nearly dragging us under the wheels. The first trucker was trying to warn the oncoming truck to slow, for our safety.