Why from Los angeles to New York values 21

[Categirn]

I only counted 20 slots passing through santa fe, little rock, nashville, pittsburgh.

[menettm]

You have to ask this question to Ticket To Ride creator !

But the reply is for the difficulty to build all this long route.

If you look all the destination cards, you will see that it is not the only case: The long destination cards points can be greater to the number of train cars needed to build all the route.

Another example : Seattle to New York is 22 points but can need 20 train cars

[Categirn]

Ok thank you for answer