Saboteur Card Path combinations

Total Number of possible unique Saboteur Card Path combinations for the route pathing.

http://en.wikipedia.org/wiki/Saboteur_%28card_game%29

Of course, the actual game might not use everything. But this is good for identifying all possible combinations and their assosiated unique ids (and implied valid paths).

I even manually counted all the combinations, excluding multi-level crossroads. Have I missed anything?