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53 stations with a couple dozen robotic fare gates each sounds like about $3mil/yr to me. If they really did it to stop fare evasion, it was ideological, not pragmatic. They spent …

Here in Canada, Metro Vancouver implemented a tap payment system with gates for its transit system about ten years ago. They started by generating outrage about fare evaders (the p…

The way to do this with oxy-fuel is to light the torch, adjust to a neutral flame, then extinguish the flame. The resulting gas coming out of the torch should be pretty close to st…