The Bridge: Traffic Statistics
In recent years the most reliable source of data for traffic using the Forth Road Bridge has been Transport Scotland's traffic counting loop immediately to the north of the bridge.
Traffic figures were from 2008 until July 2014 reported by the Forth Estuary Transport Authority using data from the bridge’s Weigh in Motion (WiM) station.The WiM station was originally installed to monitor loading on the bridge.
Plates in the carriageway capture and record the number and weight of vehicles as they drive over a sensor. Overall counting accuracy is comparable with other traffic counting loops on the road network, however some very light vehicles may not be detected, and figures can be skewed during roadworks, as traffic in some contraflow layouts does not drive over the WiM station in one direction. The WiM station has also from time to time broken down, leaving gaps in the data.
Prior to the abolition of tolls on 11 February 2008, northbound traffic figures recorded by toll collection were reported. These were extremely accurate having been audited and accounted for.
Click on the links below to view traffic statistics from years prior to 2014.