Dealing with Camera Obstructions

NoPileups needs an unobstructed view of the rail in the tunnel. In addition, NoPileups prevents accidents best when it can see more of a vehicle. Try to place cameras in positions with as wide a view as possible.

Camera angles are also important. NoPileups works best when a camera is as close to perpendicular to the rail as possible. You may be tempted to use severe angles to cover more of the tunnel with a single camera, but this will keep NoPileups from doing its best job.

Two examples of cameras placed near obstructions

Place cameras in locations with an unobstructed view of the rail.

A diagram depicting good camera placement

Two examples of good camera placement. Both are close to perpendicular to the rail and provide a large, continuous view.

A diagram depicting poor camera placement

An example of poor camera placement. This camera has a limited unobstructed view of the rail, which will make vehicles more difficult to track.

Other factors can keep NoPileups from preventing collisions properly. These tunnel conditions can negatively impact the cameras:

  • Blowers — High pressure can cause cameras to move or shake. If mounting a camera near blowers, be sure they are tightly secured.
  • Acid Wash — Acid wash can permanently damage camera housings.
  • Wax / Soap / Water Additives — These materials can build up on the camera housing and impair visibility.
  • Steam / Spray / Mist — Steam, spray, and mist can obstruct NoPileups’ view. Do your best to find locations with the least amount possible.
  • Glare / Windows — Avoid placing cameras opposite windows.

Even the most jam-packed tunnels can install perfectly-placed cameras. Here are the best ways to work around a dense tunnel layout:

  • Find large gaps between equipment with no indication of spray or soap to place cameras.
  • Use overlapping FOV to help NoPileups track vehicles through dense equipment. Sometimes, an additional camera in a densely-packed car wash can provide the extra visibility NoPileups needs.
  • Tunnel conditions can change often. Get as much information as possible about where you plan to place a camera.
  • If an area seems too dense to provide a good, unobstructed view, consider moving or adding a camera to the other side of the tunnel.
  • Make sure cameras are accessible for regular cleaning. Also, be sure cameras will not move when cleaned, or NoPileups will need recalibration.
A camera view unobstructed by dense car wash machinery

This camera can see through obstructions and has an entire vehicle length to track the car. This angle offers a great view of the rail and vehicle. This is an ideal field of view in the presence of equipment, windows, and spray.