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The shape of prime base
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12-12-2018, 12:46 PM
Desert Mariner
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Join Date: Oct 2018
Location: Lost Pines
Posts: 144
You could try to go the way of Norwegan's and add periodic roundabouts to the tunnel. This also provides points for branch tunnels if desired.
https://youtu.be/87K7gX9rVIE
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