Inside Schengen, a border is a road sign. You cross it at motorway speed and your ETA never notices. Twenty years of that has trained every routing engine, every TMS, and every dispatcher's intuition to treat a European frontier as a rounding error.
Source: [Dev.to](https://dev.to/road511/your-eta-assumes-the-border-takes-an-hour-it-can-take-four-days-4g3)