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SCOOT data visualisation


The map behaves pretty much as Google Maps does: you can scroll around, zoom in and out, and so on in the usual way. If you click on a junction (represented by a red X), the map will switch to a satellite view and the window will zoom in on that junction. The display is as follows:

  • The junction's approaches (“links” in SCOOT jargon) and the state of their corresponding signals are shown.
  • SCOOT's estimate of the queue of vehicles at each approach is shown as a bar. The longer the queue, the longer the bar. New arrivals are shown in orange. The contents of the queue when the light turns red, if any, is shown in red. This can be thought as representing “frustrated” drivers. If all is well, the queue is shown in dark green.
  • A photo of the junction and some information about it are shown in the info window. The “details” will tell you the SCOOT name for each link as well as raw data (queue length, back of queue, etc.). Note that these data may be a bit nonsensical without some knowledge of the SCOOT junction model.

If the info window is obscuring things, you can close it either using its close box or by clicking on the map elsewhere (i.e., not on the junction and not in the info window). To get it back, click on the junction's X. To select a different junction, double-click on the X.

There are two important things that you should watch out for:

  1. Pedestrian crossings don't work; this is because each requires some tedious meta-data regarding the positions of its stop lines. This will gradually improve.
  2. There appears to be a bug in Google Maps that sometimes causes the queues to be drawn very strangely, or not at all. Changing the zoom level (and even zooming out and back in again) seems to fix this.