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Story summary
- National Highways built a 45-metre bat tunnel under the new A421 dual carriageway.
- The tunnel runs between Black Cat roundabout in Chawston and Caxton Gibbet roundabout near Cambridge.
- It is 4.5 m high and 45 m long, providing a safe wildlife crossing.
- Ecological surveys identified local bat flight paths and guided the tunnel’s design and fencing.
