Scout Deployment Guidelines

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Positioning Scout properly is key to recording usable video and getting accurate results. Follow these guidelines as closely as possible when deploying Scout.

Distance from Roadway

12ft recommendations

  • The VCU should always be within 12 ft (4 meters) of side of roadway or intersection being recorded
  • Avoid deploying to structures with obstacles under 20 ft (6 meters) – bare structures are ideal
  • Make sure that the view of the intersection is not obstructed by objects such as trees

Viewing Distance of Camera

Intersection TMC 175ftATR 175ft

  • Movements within 175 feet (53 meters) of the VCU can be accurately processed
    • If deploying for an ATR, a maximum of 4 lanes (lane separated) or 6 lanes (by direction / volume only) <175 ft (53 m) can be accurately processed
    • If deploying for a TMC, a maximum of 6 lanes per approach per VCU <175 ft (53 m) can be accurately processed
  • Movements or lanes outside of the <175 ft (53 m) range will require additional cameras to capture

Note: For Pathway or Junction (pedestrian and bicycle) study types, movements should be within 125 ft (38 m) for best results. See Pedestrian and Bicycle Studies for more information.

Mast Height and Viewing Angle

  • The mast must always be fully extended to its maximum height to ensure full view of the study area
  • Check that all movements and approaches are within the camera’s field of view by performing a Camera Check from the Hardware screen

Glare from Sun/Streetlamps

  • Avoid placing the VCU where the camera will be focussed directly on a streetlight – glare may obstruct views
  • Wherever possible, do not place the camera facing directly towards the horizon during sunrise or sunset
  • A North/South viewing axis is recommended
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2 Comments

  1. Ray Schneider

    Please add more to your ATR description above in terms of this: Does an ATR Scout count have the ability to count by direction (as long as no more than 175 feet across)? We want to do an ATR by direction for a 5-lane roadway. We do not need by lane, but we do need by direction.

    1. Lindsey

      Hi Ray,
      Thanks for your comment! The article currently states that a maximum of 6 lanes (volume only) <175 ft can be accurately processed. Is this the information you were looking for? Perhaps the "volume only" reference doesn't clearly correspond to "by direction"? I will update the article now to clarify that. If I've misunderstood your request, or if there's anything else you think can improve this article, please let us know!

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