When lightning struck the box, it blew a fuse, which caused two catastrophic problems: it cut off communication and froze the signal on the color green.

NEWYORKER: Boss Rail

According to investigators, the signal that failed in the Wenzhou crash was developed over six months, beginning in June, 2007, by the state-owned China Railway Signal and Communication Corporation.

NEWYORKER: Boss Rail

Their first test in October 2007 was a success: An all-electric car plugged in at the University of Delaware and rigged with communication software responded to a signal from PJM for a sudden burst of power to help balance supply and demand on the grid.

FORBES: Magazine Article

The long term objective of this project is to develop and apply innovative information and communication technologies for image and signal processing in order to better safeguard, diffuse and promote oral and intangible forms of cultural expressions proclaimed by UNESCO as masterpieces of the heritage of humanity.

UNESCO: Outline of Digital Archiving Project

First of all, every commuter rail system has full time maintenance crews, and they always have plenty of work: changing lightbulbs in the tube, fixing a signal that got bumped, replacing an on-track communication cable that was vibrated out of place and smashed, etc.

FORBES: Why Does BART Need To Do Nightly Maintenance?