Originally Posted by
gandalf7
I didn't understand what you meant by "You can book surface segments by simply not selecting a flight for the relevant segment. Note these are still included in the segment count"
That means that you can drive from Prague to Warsaw by train/car. Star Alliance will count that so called surface sector as one of the 16 segments.
When you are flying AAA-PRG and WAW-BBB, this will count as three segments although you only took two flights.
The same is true if you are flying AAA-PRG and then FCO-BBB and you are driving from Prague to Warsaw and then on to Vienna, Zurich and finally Rome. There will be only one surface sector (between PRG and FCO), no matter where and how you spent your time in between.