Even if you go out every Tuesday, you can't anticipate anomalous events which may impact traffic. I use Google Maps even when I'm going to a known destination,

Even if you go out every Tuesday, you can't anticipate anomalous events which may impact traffic. I use Google Maps even when I'm going to a known destination, because it will tell me if there is a traffic problem on my normal route before I encounter it and enable me to route around it easily.