Does anyone know what these markings could mean? : r/trains

Does anyone know what these markings could mean? : r/trains

More train symbols! What do these mean? : r/trains

Original 1957 Full Page Magazine Advertisement for HERTZ

Trail Maps - Arizona Snowbowl

Marking clearance points at turnouts - the MRH Forum

The Meaning of Doodles: Squiggles Aren't Just Squiggles - 99designs

More train symbols! What do these mean? : r/trains

Ticket to Ride Board Game, Family Board Game, Board Game for Adults and Family, Train Game, Ages 8+, For 2 to 5 players

Railroad