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Set the “Longest Road” card aside if—after a longest road is broken—several players tie for the new longest road or no one has a 5+ segment road. The “Longest Road” card comes into play again when only 1 player has the longest road (of at least 5 road pieces).
The longest road card is retained by
it's current owner until one of two
Another player builds a road that is then longer than the longest road
of the current card-holder. In this
case, the new longest road owner takes
the longest road card.
The longest road is broken by the placement of a settlement along its
length (remember to obey the 2-step
rule). In this case, everyone must
check to see who has the longest road.
If any single player has the longest
road (note that it could be the same
as the old player with the longest
road) than that player takes the card
and the two points. If more than one
player has the longest road, or if no
player has a road of at least 5
segments, then no one gets the longest
road card and it is set aside. As soon
as any player builds a longest road of
at least 5 segments, then he may claim
the card as normal.