crossbucks
/ˈkrɔːsˌbʌks/
noun
- A railroad sign consisting of two white boards crossed in an X shape, placed at a grade crossing to warn drivers of an approaching train.
- The railroad replaced the wooden crossbucks with new reflective ones for better visibility.
- The old crossbucks at the rural crossing were faded and hard to see at night.
- Drivers must stop when the lights flash at a crossing marked with crossbucks.