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The #8 single slip is now built with moving frogs in the center to eliminate potential problems with off-center wheel-sets trying to take the wrong route. It requires two extra switch machines. Shorter slips don't have this problem, and all are built with fixed frogs. (original fixed-frog version shown)
The #8 single slip is now built with moving frogs in the center to eliminate potential problems with off-center wheel-sets trying to take the wrong route. It requires two extra switch machines. Shorter slips don't have this problem, and all are built with fixed frogs. (original fixed-frog version shown)