int get_turnout(unsigned) const;
const std::map<unsigned, int> &get_turnouts() const { return turnouts; }
void add_track(const Track &);
void add_tracks(const std::set<const Track *> &);
int get_turnout(unsigned) const;
const std::map<unsigned, int> &get_turnouts() const { return turnouts; }
void add_track(const Track &);
void add_tracks(const std::set<const Track *> &);