http://www.safety.networkrail.co.uk/Download.aspx?fileid=%7B83C26C63-97AC-4A33-A73C-2AEE45154A9A%7D&name=LXA.pdf&extension=pdf
Given that normally if you cross wigwags, you'll be hit by a train, fire engine or ambulance, or end up getting wet, I can understand why there's no facility to let a...