Rio de Janeiro
In Age of Steam, a standard build would be a straight, loose/tight curve tile. Normally the cost of this is $2 on "green" hexes.
In Steam, a standard build would be a two-ended tile (normally this costs $2, $1 for each end, but in this case it costs $3).
How much would a 3-ended tile would cost then? $4 ($3 for the two ends plus $1 for the additional end) or $5 ($1.5 x3, rounded up)?