Forth Road Bridge Opens For HGVs

View - Phased reintroduction of Heavy Goods Vehicles (HGVs) to the Forth Road Bridge began from Thursday night (4th of Feb, 2016). Structural monitoring installed at the truss end links of the structure show the bridge can now allow a limited number of HGVs to cross - up to around 600 northbound between 11 pm and 4 am nightly, starting February 4, 2016 subject to weather conditions. The structural monitoring systems installed on the FRB provide live data on the behaviour of the bridge to inform decision making and modelling while 90 per cent of traffic has been crossing successfully since the reopening. The information from the monitoring systems has shown that phase two of the repair work to strengthen the bridge needs to be completed in full to the main span locations before the bridge can fully reopen to HGVs. The impact of high wind and wet weather has limited the opportunities to carry out this sensitive phase of the repairs. Preventative works are also required at two other pin locations. Consequently, the bridge is now scheduled to be fully reopened to HGVs with no restrictions by mid-March. Relaxing the current HGV restrictions during the night, when traffic volumes are lighter will help to mitigate the impact of the closure, without causing over stressing of the structure. A dedicated HGV lane and stacking area will be in operation to help manage the traffic flow across the bridge. Traffic signals will release HGVs on to the bridge at a rate of one every 30 seconds. The release rate has been calculated by engineers as the optimum rate to maximise the number of vehicles able to cross whilst minimising the impact on the structure. While this timescale is obviously subject to weather disruption, we have built in a contingency to account for the type of weather that can be expected at this time of year. This will initially be a trial and the behaviour of the structure will be monitored throughout the process, the outcome of which will determine wh at Forth Road Bridge - South Queensferry, United Kingdom - Thursday 4th February 2016 (12 Pictures)


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