This confluence is on or near the Interstate-5 southbound exit ramp to Salem Parkway at the north end of Salem, Oregon, the state capital. I was not the first to vist this location and had no interest in documenting a second or third report.
Salem Confluence visited in 2000. 45.0, -123.0 Salem Confluence
My experience at the site is similar to a 2004 report.
This confluence was both easy and hard to reach. The easy part was getting to the general vicinity of the confluence. You just drive south on Interstate 5 and carefully pull over and park on the shoulder.
The hard part was getting to the precise spot of the confluence. Our GPS unit showed that the confluence was on the actual on-ramp in the flow of traffic.
To get to the spot where our GPS unit showed all zeros, we had to wait for a pause in the traffic. Then I carefully moved over onto the road while my wife took pictures of the GPS unit.
Since we had to back away whenever we saw cars coming, I didn't have much time to find the spot. It took many tries, but I was able to get all zeros with an estimated accuracy of ±8 feet.