tunnel
Cutterhead, shield and partial trailing gantries of the tunnel boring machine known as Lady Bird. (Photo courtesy DC Water)
Bates College
When her husband took office in 1963, Claudia Alta Johnson, better known as Lady Bird, made it her mission to protect and preserve the environment. Now a giant machine, akin to a mechanical earthworm, denominated Lady Bird, has a similar mission.
Bicyclists need own separate elevated highways of their own crisscrossing towns and cities as well as out in the open linking to other metropolitan centers. If there is a mountain range ahead, bore a level tunnel right through it, which is not so... Read More