05-20-2011, 02:16 PM
Thanks so far, guys. This brings up another scenario. Over at the BNSF Mykawa Yard (or Pearland Yard), there is a main line crossing Almeda Genoa Road, with a couple sidings there too.
![[Image: image.php?album_id=191&image_id=3939]](http://www.the-gauge.net/forum/gallery/image.php?album_id=191&image_id=3939)
I have seen trains on the main going fast, at least 40 mph because Mykawa Road parallels the tracks so I can drive beside the trains. The crossing arms operate well in advance of the train getting to Almeda Genoa. Yet, I have seen the switch engines sitting within 30 feet of the crossing, with the gates up.
Hmmm.... I think I may have figured the answer. The detectors on the main are way back from the crossing, but on the sidings, they are much closer to the crossing. Make sense?
I have seen trains on the main going fast, at least 40 mph because Mykawa Road parallels the tracks so I can drive beside the trains. The crossing arms operate well in advance of the train getting to Almeda Genoa. Yet, I have seen the switch engines sitting within 30 feet of the crossing, with the gates up.
Hmmm.... I think I may have figured the answer. The detectors on the main are way back from the crossing, but on the sidings, they are much closer to the crossing. Make sense?