26. Despite being the same bit of road, the M25 changes into the A282 briefly as it crosses the River Thames near which location, which gives its name to the crossing?
From Quiz Around the M25 in Ten Questions
Answer:
Dartford
The Dartford Crossing refers to both the bridge and tunnels that respectively go over and under the Thames as it heads eastwards from central London out to the North Sea. The tunnels, which carry northbound traffic, are around 0.9 miles long, while the main section of the Queen Elizabeth II Bridge, which facilitates southbound traffic, is around 0.3 miles long. The crossing opened with a single tunnel, but traffic demands necessitated the construction of a second and, later, a bridge. The Dartford Crossing, nowadays a free-flow toll road, still suffers from significant congestion and is one of the busiest sections of the London Orbital Motorway during peak hours.