Shawn Martin
Traffic Department Manager
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Traffic Specifications
About ACHD's Traffic Department

The Ada County Highway District's Traffic Department is responsible for planning, designing and managing efficient traffic flow and traffic safety throughout Ada County.

The Traffic Department is comprised of the Traffic Engineering Section, the Congestion Management Section and the Traffic Operations Section. The Department handles all the traffic-related issues on public roads in Ada County except those on the State Highway and Interstate system, which are under the jurisdiction of the Idaho Transportation Department (ITD). The ACHD, by agreement, also maintains all traffic signals and most of the Intelligent Transportation Systems (ITS) on the ITD system within Ada County. The Department also conducts traffic engineering investigations to determine traffic control needs and is responsible for determining and posting speed limits in Ada County.

Major Recent Accomplishments of Department

  • Maintenance and operation of over 420 traffic signals.
  • Installed traffic detection cameras at 281 intersections.  Learn more
  • Installation and operation of flashing yellow left-turn signals at 127 intersections.  Learn more
  • Installation and maintenance of 35 pedestrian hybrid beacons, 23 conventional pedestrian signals, 8 yellow flashing beacons and 5 Rectangular Rapid Flashing Beacons (RRFB) for safer pedestrian crossings.
  • Installed stop signs at over 80 intersections in Boise's East End.
  • Installation of reflective raised pavement markers on 150 miles of roadway.
  • Implemented new traffic signal timing coordination plans for Eagle Road and the traffic signals in and around Downtown Meridian.
  • Installation, maintenance and monitoring of 100 CCTV cameras for traffic incident management.
  • Remodeled the Traffic Management Center to include three new workstations and 10 - 55 inch flat screen monitors.
  • Posted over 3,000 traffic incidents on the ACHD web page last year.
Video: Roundabouts Put to the Test