The fastest-looking road is not always the fastest trip
A rideshare app is usually trying to predict the time to the destination, not simply choose the road with the highest speed limit. A neighborhood route may move more slowly mile for mile, yet avoid a highway entrance where traffic routinely backs up, a complicated merge, or a signal that can add an unpredictable wait.
Route planners estimate how long each road segment is likely to take using factors such as current traffic, road layout, and turns. They can compare a steady sequence of slower streets with a shorter route whose travel time swings sharply when one bottleneck jams. A slightly slower but more predictable path can produce a better arrival-time estimate.
The whole ride matters, not just the map line
The route also has to work for a driver in motion. A road that looks direct on a map may require an awkward turn, a difficult lane change, or a detour to reach the correct entrance. Nearby streets can offer easier turns and more practical access, even if they add distance.
That calculation can change as conditions change. If congestion clears on the main road, the app may favor it; if a queue builds, a neighborhood route may become the more reliable choice. The apparent detour is therefore not necessarily a mistake or a preference for local streets. It can be the algorithm trading a little speed for fewer delays—and a more dependable arrival time.
