External causes of frustration involve conditions outside an individual, such as a blocked road or a difficult task.

He described the overall situation as unchangeable, but underlined the need for opening blocked roads.

Relief efforts were also delayed because of blocked roads, bad weather and political turmoil in the region.

Some of the blocked roads took months to clear.

No tourist resorts were affected by the event, except for a few small hotels inland where some blocked roads caused access restrictions.