roadbed

In that case though, there were only 4 very short eyebeams supporting the roadbed, one at each corner.

So these are produced in large panels, which are laid on a compacted roadbed, or perhaps on concrete supports.

Adding technology along the roadbed for extra safety, getting trucks out of the current population on highways, etc etc.

It takes 10 hours and uses tracks that are mainly used for freight, and much of the roadbed is single track, too narrow, and too low-quality to support 200 mph trains.

Their proposal is running heating elements through the roadbed.

As soon as his car left the regular roadbed, it went out of control, sideswiped the bridge piling, flipped several times and came to rest upside down.

The underlying facts of road maintenance are that basically all of road maintenance (except that attributable to erosion of the roadbed) repairs damage caused by heavily-loaded trucks.

With that, you could buy a controlling interest in Union Pacific ($123 billion market cap), kick the freight to the side ( ), and fix the roadbed.

In south Florida, the roadbed is usually just packed limestone, because the land has a rock layer no more than 50 feet down and the sandy soil is pretty incompressible, unlike the constantly expanding and contracting clay in Texas.

• There's an existing ruggedized highly-durable efficient roadbed technology for long-haul passenger and freight traffic.

I would caveat that it is the alignment you can use for high speeds, not necessarily the roadbed, but your point remains the same then.

As with other predictions, Asimov goes for flair over practicality: it's vastly more convenient to put benches on a wheeled (or tracked) vehicle than it is to move an entire roadbed.

Roadbed settling and concrete curing are two long term inactive construction projects.