Level Crossing
Treadles are commonly used to operate fully automatic level crossings since they give far more reliable and accurate detection of a train than track circuits alone, which is important when there is only just over 30 seconds between the train "striking in" (passing the treadle which starts the crossing sequence) and passing the crossing.
Read more about this topic: Treadle (railway)
Famous quotes containing the words level and/or crossing:
“No man loses ever on a lower level by magnanimity on a higher.”
—Henry David Thoreau (1817–1862)
“Nature is a setting that fits equally well a comic or a mourning piece. In good health, the air is a cordial of incredible virtue. Crossing a bare common, in snow puddles, at twilight, under a clouded sky, without having in my thoughts any occurrence of special good fortune, I have enjoyed a perfect exhilaration. I am glad to the brink of fear.”
—Ralph Waldo Emerson (1803–1882)