Posted by Jim on January 12, 2002
Intersecting railroad tracks cross through each other on a special track section called a railroad frog. Any clues how it became known as a frog other then a visual similiarly to a crushed, splayed and dried real frog?
Some explanation if curious:
http://www.romarpipeandrail.com/turnouts__&_switch_components.htm
or
www.web.mit.edu/Invent/www/InventorsR-Z/Westinghouse.html