Beyond the typical two-week vacation scenario.
For travelers planning to drive regularly over a longer stay abroad, an IDP provides a consistent, recognized document for the full period it remains valid, rather than needing to explain a foreign license from scratch every time. This matters more the longer someone plans to be driving in a country where their home license isn't broadly understood.
Since permits are generally valid for one year, longer-term travelers should plan around renewal timing if their stay extends beyond that window.