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> "One early idea was to place a magnetic coil under the asphalt surface of a road to detect the approach of vehicles along a single route to an intersection an
by InclinedPlane 8y ago
> "One early idea was to place a magnetic coil under the asphalt surface of a road to detect the approach of vehicles along a single route to an intersection and then adjust the duration of the green and red phases accordingly."
Huh? This is already common practice, why is this "an idea"?
- adrianmonk 8y agoI think the main difference with their solution is that, since vehicles carry the equipment, 100% of intersections would be covered. Some cities have synchronized lights, but as far as I know, it is only at key intersections. Presumably, the increased efficiency comes from shaving off time at every intersection on your entire trip. Seems like they'd also get more data (number of cars, individual positions and headings) and may be able to do something smarter with additional data.
- takk309 8y agoUsing existing sensor to collect more data is an ongoing challenge for many municipalities. There is an add on module for signal controllers that can be used to count vehicles and depending on the detection type (video, inductive loop, or microwave) the counts can distinguish vehicle type and users such as car vs bicycle.