Ridership at RVR, counting passengers only once (or or off, not on and off), is approaching 500 per day. Still a good amount.
The number of boardings and alightings at Staples Mill was 345 thousand in FY2012. Does not matter whether they were getting on or off, each one was a passenger going through the station, sitting on a bench, using the restroom, parking or retrieving their car, or if it was the same person that boarded a WAS bound train in the morning and got off a southbound train from WAS in the evening. They are not getting on and off on the same train.
With the growth in VA passenger ridership, RVR may reach 365K total passengers in FY2013 or a 1000 a day. As recently as FY2007, total number of passengers at RVR was 234 thousand, so the station has had a 50% growth in passenger volume in 5 years. RVR and the parking capacity were not built for that many. VA DRPT may have to give higher priority for the plans to replace RVR with a new suburban station.