If you track trailers independently from tractors, Samsara enables you to track trailer movement in two ways: by allowing drivers to select trailers and by automatically detecting tractor and trailer configurations. Use this visibility to verify routes and driver HOS logs. Trailers with a powered Asset Gateway (AG) require a paired Vehicle Gateway (VG) to display as a Linked Asset
on the Trip History Report and the asset Trip History map.
There are two ways to pair a VG with a trailer's powered AG:
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The driver selects the trailer from the Driver App.
OR
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Samsara automatically pairs trailers with a powered AG to tractors with a VG.
Samsara actively monitors the status of the VGs and AGs to identify pairing associations between the AG of the trailer and the VG of the tractor. Samsara identifies associations to indicate hardware pairing using the following criteria:
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Pairing criteria:
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Both powered AG and VG have to be currently on a trip (powered and moving).
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Current tractor and trailer location is within 100 meters of each other for the past 2 min.
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If a VG is on a trip before an AG is on a trip, it will still pick up the AG when the criteria for pairing is met. Samsara checks potential pairing options consistently throughout a trip segment from the AG side.
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Unpairing criteria:
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Either powered AG or VG have a trip segment that ends. A trip is considered ended when power is disconnected for more than 5 minutes, the tractor and trailer cross a state line, the device stops moving, or a GPS outage occurs.
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The distance between the AG and VG is more than 400 meters apart.
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After a tractor and trailer are paired, the asset Trip History displays the trailer pickup and drop-off locations on the asset Trip History map. Select an asset to view the asset trip history map (Overview > Assets).
To view trailer pickups and drop-offs on the asset map, click Map options ( ) and select the Trailer Pickup/Drop-off Overlay. Hover over the pickup icon ( ) or the drop-off icon ( ) to view the event details.
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