In situations like the one you described, it's natural to be concerned about who might get fined when a speed trap flashes. Here's how it typically works:

Speed traps are generally designed to capture the speed and license plate of the vehicle that is speeding. These cameras are sophisticated enough to distinguish between vehicles in different lanes, especially when there are clear speed differences. In your case, since the pickup truck was in the rightmost lane and you were in the middle lane, the camera should have captured the speeding pickup truck if it was indeed going over the speed limit.

Given that you were driving at or slightly below the speed limit according to your GPS (108 km/h), it's unlikely that your vehicle will be fined. The speed trap likely flashed because of the pickup truck, which was moving faster than you.

However, there are some scenarios where errors could occur, but these are rare. If you were driving within the speed limit and the camera's technology is working correctly, your car shouldn't be flagged for speeding.

If you do end up receiving a fine, most jurisdictions allow you to contest it, especially if you believe you were not the speeding vehicle. You could use evidence from your dashcam to support your case if necessary.