How do we make fire? What's the state of 3D printers and what's it like working with one? Learn the answer to these questions and more as Jonathan and Lauren explore the science behind all things tech in TechStuff, a podcast by

Categorized: Technology Education

Sep 15, 2010 1:12 PM
How Railroad Crossing Signals Work

Every driver has seen a railroad crossing -- the iconic system of bars, lights and warning bells designed to keep cars away from trains. But how do they actually work? In this episode, the guys explore the technology powering railroad crossing signals.


You can log in with any of the below accounts, no sign up is needed. Just click on the logo for the site you would like to use.

Login or Signup recommended

Select one of these third-party accounts


Login using a CastRoller account

Username or Email

Password (Forget your Password?)

© CastRoller, 2014 About Us, Terms of Service, Privacy, Copyright, Help, Contact Us