Annual vehicle usage of the Queensway Tunnel had exceeded 11 million by 1959, causing severe traffic congestion at peak commute times, partially as a result of low toll costs.

The approach to the tunnel on the Wirral side uses the former railway cutting that carried the Seacombe branch line.

There is an annual 10k run that passes through the Kingsway Tunnel, starting in Liverpool city centre with the finish line in New Brighton.

Of the two tunnels crossing the River Mersey, Kingsway is the only one able to take heavy goods vehicles (HGVs).

In a study following the fire in the Mont Blanc Tunnel in 1999, inspectors from the European Union rated the Kingsway Tunnel as "good", one of fourteen to receive that rating in Europe.