Round Reflective Motorway Stud Lights With Spike For Tunnel
SMART Tunnel – Wikipedia
The four modes of operation and storage capacity. The first mode, under normal conditions where there is no storm, no flood water will be diverted into the system. When the second mode is activated, flood water is diverted into the bypass tunnel underneath the motorway tunnel. The motorway section is still open to traffic at this stage.
Motorway studs explained | colours of reflective lights in the UK
Green: Indicates a slip road off and on the motorway. Red: L...