Error: Relation ["table name"] does not exist
You try to create relations (constraint) before create parent objects, for example:

order #2:

CREATE TABLE Driving 
(
Id           CHAR(11)         REFERENCES Driver ON DELETE CASCADE,
BusId        INT              REFERENCES Bus    ON DELETE CASCADE,

PRIMARY KEY  (Id, BusId)
);


but table Bus at this moment not created.

2 possible solutions:


Create tables in order - from parent to child (not always possible)
Create all tables without constraints and add all of them after