The map is mixed and there is some open roads to open up the power and floor it in the bus and then there also those tight and twisty roads that will challenge your driving skills to the limit. The map is well detailed and has realistic road textures as would be typically seen in the real world.
Here is my latest let's play of OMSI 2 Bus Simulator and I am using the Mercedes Benz Citaro Euro 6 single deck bus that is freeware on the newly released payware map that is Keedlestone V1.8 that is a British bus map and it is based somewhere in Derbyshire if I remember correctly.