Why doesn’t RTD use age-old tech­nol­ogy at rail cross­ings?

The Denver Post - - OPINION - Re: Bill But­ler,

“G-Line launch might not come un­til 2018,” June 30 news story.

I’m sur­prised RTD hasn’t gone back to the tried-and-true mech­a­nism for low­er­ing and rais­ing rail­road cross­ing arms that has been in use since the early 1900s. The so­lu­tion is to iso­late all the cross­ings from each other and from any com­puter net­work, and place sen­sors in the track be­fore and af­ter the cross­ing. When the train is com­ing, a sen­sor causes the gates to go down; af­ter the train passes, an­other sen­sor causes the gates to go up. This is not rocket sci­ence.

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