Why a “shortcut” can look like a detour
A navigation app does not choose the route that looks simplest on a map. It compares the roads in its digital map and assigns each one a cost—usually an estimated travel time, sometimes adjusted for traffic, tolls, turns, or other preferences. A chain of narrow streets can therefore beat a major road in the app’s calculation, even if the route feels awkward from the passenger seat.
The difference may come down to small estimates. If the app thinks a busy avenue will be slow, or that several side streets can be crossed quickly, it may send you off the main road. In a dense old-city grid, those little links can add up to a route that is technically efficient but unfamiliar and uncomfortable to follow.
Why foreign streets make the problem more noticeable
Route quality depends on the map’s details: which streets connect, whether turns are allowed, and how fast vehicles can travel on each segment. Those details are not equally complete or current everywhere. A road may be misclassified, a restriction may be missing, or the speed estimate may not reflect local conditions. The app can then optimize a version of the city that differs from the one you are actually driving through.
That mismatch is especially visible on small streets, where one incorrect connection or travel-time estimate can change the chosen route. The app is not necessarily taking a random turn; it is responding to the costs and connections recorded in its map.
The practical takeaway
Treat the suggested route as a calculation, not a promise that the road will feel sensible. If a route looks implausible, check the next few turns and the arrival-time difference before following it. A tiny predicted time saving may not be worth threading through unfamiliar lanes.
