Definitions

from The American Heritage® Dictionary of the English Language, 4th Edition

  • n. The foundation upon which the ties, rails, and ballast of a railroad are laid.
  • n. A layer of ballast directly under the ties.
  • n. The foundation and surface of a road.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. The prepared location for a road, including its foundation.

from the GNU version of the Collaborative International Dictionary of English

  • n. In railroads, the bed or foundation on which the superstructure (ties, rails, etc.) rests; in common roads, the whole material laid in place and ready for travel.

from The Century Dictionary and Cyclopedia

  • n. The bed or foundation on which the superstructure of a railway rests.
  • n. The whole material laid in place and ready for traffic in ordinary roads.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • n. a bed supporting a road

Etymologies

road +‎ bed (Wiktionary)

Examples

  • Unfortunately the roadbed is very poor, so the new repairs deteriorate rapidly.

    Is there a problem bringing a small trailer to MX?

  • But note that there are some long stretches where the roadbed is not that great, with the top inch or so of pavement peeling badly, especially in the right-hand lane.

    Toll roads from Nogales to Tepic

  • We simply say that the west provided the money, and the road has been built up to mile 332 with the very finest road bed in Canada, with 80-pound steel rail, and from Kettle Rapids to Nelson, 91 miles, the roadbed is just waiting for the ties and rails.

    Hudson Bay Railway and Immigration

  • Although the parapets were built of stone, the roadbed was a loose strip of lateral planks.

    The Cat Who Knew Shakespeare

  • - If your car is damaged from hitting the "roadbed," such as by striking a big pothole, your collision coverage might cover repairs, minus your deductible.

    Omaha World-Herald > Frontpage

  • It's kind of funny during rush hours, because one cop stands in the roadbed furiously waiving drivers down -- ALL DRIVERS.

    Page 2

  • Now he was hanging out of the truck by one leg, his head just inches from the roadbed speeding by, the tire kicking up gravel and small stones into his face while the others shouted.

    The Captain's Hat

  • The community features roadbed made from recycled concrete and water-conserving native plants.

    Lee Schneider: Michelle Kaufmann: An Architect Driving Change

  • Apparently, no one lives here anymore, and we raised a cloud of dust from the dead soil as we drove on, hovering our scant few centimeters above the broken roadbed.

    New Race

  • However, through amicable negotiations, it was replicated on a deck over the roadbed, which was leased back to the shareholders.

    Michael Henry Adams: Great Houses of New York: The River Club, the Best Address, Part III

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