Either "not many" is not the correct answer to the question, "How many trains go by Cove Road", or I'm a very lucky guy.
There is usually a big train leaving Pavonia in mid-afternoon, and another coming in. I've seen both several times while riding the River Line. And about a decade ago I hi-railed the Bordentown Secondary, and we set off at Cove Road around 4 in the afternoon. We hadn't even had time to release our Form D and report clear when a train came out of Pavonia on the track we had just occupied, doing about 25 MPH.
Conrail track charts indicate about 25 MGT on that railroad, so it's fairly busy.
Randy Resor, aka "NellieBly" passed away on November 1, 2013. We honor his memory and his devotion to railroading at railroad.net.