A-B-C-D = Possible in real life
A-C, A-B, A-D = Impossible in real life
Thats what the restriction tries to inhibit. But the script wont allow more than 2 One-ways per route. Rules state you cannot have more than 2 *.5's per route, this is not just 0.5s but 1.5s etc
edit: fixed some logic.
Air Elb's way of putting it:
you can't have [code side enforced] illogical one-way flights on an airplane anymore. (technically it's possible, but the possibilities are greatly reduced from last age). The old, 2x.5 per city pair rule is unaffected, and is still is likely to be enforced. Sorry if this is confusing. the code enforces [usually] the physics of the flights now, whereas the administrators/mods [us] still enforce the old 2x.5 rules.
