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Signal Failure (Again) Likely Caused Shanghai Train Collision


Two subway trains collided in the city of Shanghai on September 26, injuring hundreds, according to early reports. And, much like the collision of two high-speed trains that killed 40 people near Wenzhou on July 23, the culprit appears to be signal failures. According to Chinese news magazine Caixin, the signals began to malfunction at [...]

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Plugged In

Did Congestion Charging Just Go Viral?

Congestion charging point in Stockholm. Image courtesy of Transport Styrelsen.

What is congestion charging? Congestion charging or pricing is the practice of setting up cordon tolls around the city on a large-scale to charge entrants for entering during peak hours. Ideally, this is done in an automatic fashion with cameras registering your license plate and directly billing you. This is different from low emissions zones, [...]

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