Why would it be expensive? Traffic lights and sirens are cheap. The Tasman bridge apparently stops traffic for all large ships https://en.m.wikipedia.org/wiki/Tasman_Bridge
Why would it be expensive? Traffic lights and sirens are cheap. The Tasman bridge apparently stops traffic for all large ships https://en.m.wikipedia.org/wiki/Tasman_Bridge
Also had a disaster. "The Tasman Bridge gained national attention following the Tasman Bridge disaster. On 5 January 1975, the bridge was struck by the bulk ore carrier SS Lake Illawarra"
And will you also be revealing the cost of stopping traffic versus the expected loss of what it prevents?