CAMPAIGNERS have called off a 20mph protest after hundreds of drivers threatened to block the Prince of Wales Bridge.

Protestors from a ‘car community’ opposed to Wales' new 20mph default speed limit initially planned to block the Prince of Wales bridge on today, Saturday, September 30.

Around 100 to 300 people were expected to turn up.

The community, who believe the new default speed limit of 20mph is ‘dangerous’, were planning to either block the bridge or drive along the M4 at 20mph from Aust services near Thornbury to Cardiff Gate.

Gwent Police told the South Wales Argus that the force spoke with the organiser of the protest yesterday and explained the ‘safety implications of the potential protest.’

Instead, the protestors are planning to stage a protest outside the Senedd in Cardiff today, September 30.

Caitlin Louise said: “Plans have changed, we’re going to the Senedd in Cardiff now for 1/2pm on Saturday afternoon.”

The petition to reverse the switch to 20mph has become the most-signed petition in Senedd history.

Earlier this month, Wales became the first nation in the UK to lower the default national speed limit on residential roads from 30mph to 20mph. 

A petition against the 20mph rollout in Wales has been signed by more than 430,000 people.

The Welsh Government has said that cutting the speed limit would protect lives and save the NHS in Wales £92 million a year.