I understand that the longest route means the most number of continuous trains, but does continuous mean "connected?" In other words, are spur routes included as long as they are connected to the main route?

  • Right, it's not "has placed the most routes that are pairwise connected to another of your routes." – The Chaz 2.0 Jan 1 at 20:23
  • I think the problem is that “continuous” is not the clearest word to use. I was going to quote the rule book in my answer, but it turns out it really doesn’t make it explicit. It just relies on common English understanding of “continuous route”. – GendoIkari Jan 1 at 20:57

Spurs are not included.[1] Being connected is not sufficient; the routes must form a continuous path.

The rules say

The player who has the Longest Continuous Path of routes receives this special bonus card and adds 10 points to his score. When evaluating and comparing path lengths, only take into account continuous lines of plastic trains of the same color. A continuous path may include loops, and pass through the same city several times, but a given plastic train may never be used twice in the same continuous path. In the case of a tie for the longest path, all tied players score the 10 point bonus

Let's use the following network as an example:


How many routes are in this longest continuous path? Obviously, it's at least 4 (A-B, B-C, C-D, D-E). Is there a way of including C-F without jumping (not continuous) or revisiting a route (explicitly disallowed)?

  • If you travel along the path A-B-C-D-E, you'd need to jump or backtrack to visit C-F.
  • If you travel along the path A-B-C-F, you'd need to jump or backtrack to visit C-D.
  • If you travel along the path F-C-D-E, you'd need to jump or backtrack to visit B-C.

So no. The longest continuous path consists of four routes.

This is confirmed through play with multiple groups and through use of the official electronic version. Note that at least one map (Asia) awards points for largest network, which includes forks (though this counts cities rather than routes).

  1. Unless you can loop back. For example, the following has a continuous path of 5 routes:

            / \
           /   \

"Continuous" means a line starting at one end and ending at another end; branching paths will not help at all. A "continuous path" means that you can travel along that path without backtracking or skipping around; with a branch/fork in your trains you wouldn't be able to go along all of those trains without backtracking or skipping. So you only count the longest branch of a fork.

You can find more discussion with the same answer here.

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