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Emergency Vehicle Signal Preemption

Where ITS stops being a traffic-efficiency program and becomes a life-safety system.

Left to right is time. Each row is one of the 6 disciplines this one worked alongside, ordered so kindred disciplines sit next to each other rather than alphabetically — a landscape only means anything if neighboring rows belong together. Height is the work running in that domain in that year, weighted by what failure would have cost — life-safety ×3, a statutory obligation ×2.2, the estate itself ×1.5, an evaluation ×1. Every project declares which of those it was, so each ridge traces to an entry you can open and disagree with. Only the work that used this technology is counted, so what shows here is the company it kept rather than the record around it. Height and color are on the record-wide scale rather than this page’s own, so a modest estate draws a modest landscape and any two of these pages can be read against each other.

Delivered traffic signal preemption for Fire and Rescue, integrating the intelligent transportation system with automatic vehicle location so responding apparatus could hold or call a green through signalized intersections and clear the route ahead of them.

Emergency preemption only works if the roadside, the vehicle and the central platform agree in real time.

Applied in

  • JTA and Downtown Transit Connectivity2006–2023Seventeen years on the boundary between two public agencies that could not direct one another — first as the city's architecture review on transit proposals, then as owner of the interconnect itself.
  • Emergency Vehicle Signal Preemption2008–2015ITS integrated with vehicle location so responding apparatus could clear the route ahead of them.

See also

Also searched as

  • smart city
  • connected infrastructure
  • V2I
  • adaptive signal control
  • traffic telematics