The Queen Elizabeth II Bridge is a road bridge located in the United Kingdom, specifically spanning the River Thames. It connects the towns of Dartford and Thurrock, facilitating traffic across the river. Opened in 1991, the bridge is part of the M25 motorway, which encircles London and is one of the busiest roads in Europe. Named after Queen Elizabeth II, the bridge is a vital transportation link, helping to reduce congestion on other routes. It features a cable-stayed design, allowing for a clear passage for ships navigating the river below. The bridge is an important part of the region's infrastructure.