- Culverts - metal, plastic or concrete pipes installed under roadbeds to channel runoff - are not always the best solution for drainage, but they are common and sometimes necessary.
- They begin beneath the roadbed where subsurface water meets the advancing frost line and forms a layer of ice, called a lens.
- A minority of these roads, although listed with a carriageway of constant thickness, may have had a similar surface profile, provided the roadbed on which they were formed had a central camber.
- Extant contracts do not give information about the profile of the roadbed except that it was not to be below the level of the adjacent ground.
- Add such attachments as scarifiers, and graders can even tear up old roadbeds.
- Concrete from the demolition of the site's previous buildings was reused in roadbeds.
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- Sections of the roadbed where erosion and poor landscaping along steep grades create a safety concern will also be reinforced or shored-up.
- The board said it believes someone crept down to the dusty roadbed after the last vehicle went by and dug in a mine to catch the next passing vehicle.
- The roadbed looked like it was made from rectangular white building stones, grouted together carefully, that had been grossly discolored.
- These carefully concealed elevators, built within the highway tunnels located in Portland's West Hills, will have the capacity to lift both vehicles and helicopters to the highway roadbed.
- On our left, a sheering ledge cut off the roadbed.
- Petroleum emulsions work for dust suppression, particularly on dirt roadbeds and shoulders in arid areas.
- Officials said that three storms in the last two months collapsed roads and destroyed roadbeds in the park.
- Because the melted water cannot drain into the frozen subsoil, the upper lifts of a roadbed become saturated and the road's load bearing capacity is greatly reduced.
- The total area of land being acquired is 141.26 Ha, consisting of 122.42 Ha agricultural land, 10.32 Ha forestry and 8.52 Ha of roadbed.
- Shade helps protect the road from drying out in times of low precipitation; roots stabilize the roadbed.
- Road damage starts when buses and other heavy vehicles over a certain weight threshold cause the roadbed to flex and crack.
- Repairs are now underway on the roadbed where the pipe burst.
- As the water drops, submerged trees, rocks, even old roadbeds break the surface or, worse, lurk just below it, waiting to bust a prop or bend a shaft.