If they increase to the second trigger level of 40 mph, signs on the bridge approaches will direct high-sided vehicles to use the Craigavon Bridge.
For the duration of a red alert, drivers of goods and high-sided vehicles should leave the network and find a safe place to park.
However, high-sided vehicles and motorcycles were barred from crossing for six hours at the height of the storm.
The Tamar Bridge, which spans the river between Devon and Cornwall, has been closed to high-sided vehicles because of strong winds.
Closures were largely due to the toppling of multiple high-sided vehicles.
The Tamar Bridge connecting Devon and Cornwall was closed to bicycles, motorbikes and high-sided vehicles.
Guardrails are sometimes placed beneath the sides of high-sided heavy vehicles (such as lorries, semi-trucks, etc.).
The Foyle Bridge in the city of Derry was closed to high-sided vehicles due to high winds.
Due to the exposed location, strong winds can cause problems for high-sided vehicles.
Also, the high winds make it more dangerous when passing high-sided vehicles.