Ya but the bigger the bridge the better the monitoring. I used to use one that fell daily, but its not a bridge your average Yinzer crosses even on a yearly basis.
It just doesn't really go anywhere except a couple thousand homes.
The big bridges on the three rivers, on the other hand! It seems to me that they're always always under repair.
There's A LOT more traffic across the Fern Hollow bridge than if the end destination were a couple of thousand homes. Average daily traffic ca. 2005 was 14.5k vehicles including transit bus routes with articulated buses that nominally carry 70+ at capacity. At rush hour I've been on those buses and they're regularly SRO.
