Listening for EOT data bursts are a great way to tell when trains are nearby.What you can do to give you some advance warning is get scanner or receiver that can receive the road frequency for the rail line in question. As you gain experience with monitoring the railroad, you'll figure out where the automatic defect detectors are located. When you hear the detectors, you'll know where the trains are. You can also monitor the rear-end devices on 452.9375 and 457.9375 MHz. When you hear the data burst on those frequencies, a train will be close.