4 ms·
You could do the same in a pipe. I'm sure this problem has already been solved, given the thousands of road miles in tunnels that already exist. :)
by louwhopley 9y ago
You could do the same in a pipe. I'm sure this problem has already been solved, given the thousands of road miles in tunnels that already exist. :)
- gaius 9y agogiven the thousands of road miles in tunnels that already exist The Big Dig in Boston cost what, $20Bn? For less than 4 miles of road tunnel? The maths just doesn't work. What does average road cost per mile?