I don't believe you can get an RVR report that is not preceded by a runway number. RVR is predicated on a number of variables, but I understand ambient or background lighting to be one of them. If a particular piece of concrete has the city center off one end, and a forest off the other, each direction may have very different RVR values with the same mist falling.
That said, I'm not sure how forward scatter technology plays into this.
The directional issue is an old departure trick in the States. If you have suitable tower visibility for takeoff, but the RVR for the departure runway is below minimums for takeoff...well, assuming calm winds, you simply taxi around to the other end, the one without RVR, and use the tower visibility as your legal takeoff visibility report.