The Runcorn-Widnes bridge (A533) is the lowest road bridge crossing on the River Mersey and is free to cross. The Mersey Road tunnels (further down river) are toll crossings. | The Runcorn-Widnes bridge (A533) is the lowest road bridge crossing on the River Mersey and is free to cross. The Mersey Road tunnels (further down river) are toll crossings. |