Discussion related to commuter rail and rapid transit operations in the Chicago area including the South Shore Line, Metra Rail, and Chicago Transit Authority.

Moderators: metraRI, JamesT4

  by ryanbytes
I've discovered the fun of ATCS Monitor and was wondering if the CTA used ATCS in some form. I've seen antennas at crossovers on the Blue line at least although the length suggests a VHF frequency. I did ask the CTA and they refused to answer because of security. I'm guessing the antennas are for something else and I'm heck outta luck but one never knows...