A road network becomes a math problem
A city-building game cannot ask every simulated driver to consider every possible street sequence in detail. Instead, it represents roads as a network: intersections are connection points, and road segments are links between them. A route-finding algorithm searches that network for a path with the lowest assigned cost.
That cost may be little more than distance. If a shortcut across narrow dirt lanes is shorter on the map than the route to a highway, the algorithm can prefer it—even if a human driver would expect the highway to be faster, safer, or less likely to clog. Those qualities matter only if the game’s route costs account for them.
Why the shortcut can become a traffic jam
The mismatch is especially visible when many simulated trips use the same route. A small local road that looks like a harmless shortcut on the map can suddenly carry through-traffic it was never meant to handle. The jam is not necessarily evidence that the game has no traffic logic; it may reflect a simplified decision rule that favors easy-to-calculate distance over the full experience of driving.
That simplification is a tradeoff. More detailed routing can require more computation, particularly when a city has many vehicles and a large road network. For players, the result is a useful reminder that roads are not judged by their appearance or intended role. The game’s definition of “best route” is the cost its algorithm is told to minimize.
