In railway signalling, an interlocking is an arrangement of signal apparatus that prevents conflicting movements through an arrangement of tracks such as junctions or crossings. The signalling appliances and tracks are sometimes collectively referred to as an interlocking plant. An interlocking is designed so that it is impossible to display a signal to proceed unless the route to be used is proven safe.
Hey, I can help you. I know the class is Spanish but do you need the answers in Spanish or English?
Ponce de León
He would not return to Puerto Rico for two years. In 1521, Ponce de León finally returned to southwest Florida with the first large-scale attempt to establish a Spanish colony in what is now the continental United States.
