![Large-scale tunnel ring testing in the Stevin Laboratories at Delft... | Download Scientific Diagram Large-scale tunnel ring testing in the Stevin Laboratories at Delft... | Download Scientific Diagram](https://www.researchgate.net/publication/41440478/figure/fig2/AS:669151832068101@1536549637270/Large-scale-tunnel-ring-testing-in-the-Stevin-Laboratories-at-Delft-University-the.png)
Large-scale tunnel ring testing in the Stevin Laboratories at Delft... | Download Scientific Diagram
![This tunnel in Australia installed green light rings that move at the speed limit to hopefully stop people from slowing down. Think it would help in Pittsburgh? : r/pittsburgh This tunnel in Australia installed green light rings that move at the speed limit to hopefully stop people from slowing down. Think it would help in Pittsburgh? : r/pittsburgh](https://preview.redd.it/these-green-rings-of-light-move-at-the-pace-of-the-speed-v0-fnrltrcmjjoa1.jpg?auto=webp&s=2b98447e512d229883673ed72487fea2687fd31a)
This tunnel in Australia installed green light rings that move at the speed limit to hopefully stop people from slowing down. Think it would help in Pittsburgh? : r/pittsburgh
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