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Responding: Up here, WAY up north (not) WE ave what are known as Speed activated Gates for Railroad crossing, (that was a direct translation from french) Based on the speed the train is going at, the gates will go down accordingly. So let's say... hmm.. i'm conducting a Via Rail train (Equivalent to Amtrak) and i'm going 80 MPH, the gates will go down so that there is at least a 20 second warning... Now if i'm Conducting a freight train, and i'm going 35 MPH, the gates will go down accordingly so there is a 20 second warning. so in short, Based on the Speed i'm going is when the gates will go down. 80 MPH, they may go off 1/2 mile down the crossing, 35 MPH, they might go off when i'm 350 feets from the crossing. Remember, This featurew doesn't eist for all crossings. but ~70% do have the Speed based gates. Also, Most of the signals are directly after the crossings (due to the fact that Electricity is present at around 99% of the crossings) so usually trains stop just beofre the crossing. Most gates have an activity meter, that messures the activity present on the line. Should the train stop, within 4 minutes, the gates will go up. as soon as the train moves slightly.. the go back down.. in short short form, we always have at least 20 secondes warning Cheers, Kev.
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