@Cat poni, Whorseman of Apocalypse Does the driver have just normal google maps or mapy.cz in his phone and unconditionally goes where the app tells him is the fastest at that specific moment? 

 @54dd8f26 maybe they are directed by a PID/DPP dispatcher based on traffic information 

 ah yes, here we have a Predni Kopanina tour

why though, there is not a significant delay in Evropska for other buses, did the driver just came back from a break and decided to go for some country driving?

https://blovice.bahnhof.cz/media/be25618417679cc6d8e2e0adbc7689285aa058b71145ebefd883523655cadab9.png 

 you can't explain this, there isn't really any significant delays for 119's on what is supposed to be the regular route

https://blovice.bahnhof.cz/media/8d9da91c1752420e3f8d444cf74236927ac8c71aef0188c5b2ca8c60e6544c52.png

https://blovice.bahnhof.cz/media/6edd940eff67554552df56040efb23bf37373d4da2a2795f720dc5feb455aa48.png