Beside the A10 flyover in the Hertfordshire countryside, crickets bask in summer heat and road noise. The flyover has been designed to reduce the noise and impact of the road across the valley. It isn't perfect. Leaks in its noise barriers made the passing traffic sound like objects shooting along a tube. From a certain angle the cars seem to vanish in mid air. Far over on the right, as cars join the bridge on stilts, each makes a loud thump, like a giant see-saw. This is a section from the start of the New River Path between Hertford and Ware. **Re-issued in high-definition sound.**