public void addRoad(Road r, int pos) throws InfraException {
if (r == null) throw new InfraException("Parameter r is null");
if (pos > 3 || pos < 0) throw new InfraException("Position out of range");
if (allRoads[pos] != null)
throw new InfraException("Road already connected to position " + pos);
allRoads[pos] = r;
Node other = r.getOtherNode(this);
if (other == null || !other.isAlphaRoad(r))
alphaRoads = (Road[]) Arrayutils.addElement(alphaRoads, r);
updateLanes();
calculateWidth();
}
/** Adds a sign configuration */
public void addSignconfig(Sign[] conf) throws InfraException {
if (conf == null) throw new InfraException("Parameter conf is null");
signconfigs = (Sign[][]) Arrayutils.addElement(signconfigs, conf);
}