Category B crossings and transitions is secured by using self-acting level crossing signaling (ssp) with two or four semiconducts. (so-called guarded transfers).
Challenge: This puzzle has not yet been solved in {size} size. Be the first to complete it.
Category B crossings and transitions is secured by using self-acting level crossing signaling (ssp) with two or four semiconducts. (so-called guarded transfers).
Best results for size Updated every 10 min
Play similar puzzle
Comments
Rate this game
Add comment
Other puzzle from the Vehicles category