1. 
   roadbed
   [n] - a bed supporting a road
   Found op http://www.webdictionary.co.uk/definition.php?query=roadbed
   
   
2. 
   Roadbed
   Road'bed` noun 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.
   Found op http://www.encyclo.co.uk/webster/R/87
   
   
3. 
   roadbed
   noun a bed supporting a road
   Found op http://wordnetweb.princeton.edu/perl/webwn?s=roadbed
   
   
4. 
   Roadbed
   • (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.
   Found op http://thinkexist.com/dictionary/meaning/roadbed/
   
   
5. 
   roadbed
   (from the article `railroad`) ...equipment make it possible to dig deeper cuts through hillsides and to make higher fills where necessary to smooth out the profile of the track. ...
   Found op http://www.britannica.com/eb/a-z/r/55
   
   
6. 
   roadbed
   1) A bed supporting a road 2) Bed 3) Foundation for a train track 4) Street surface 5) Track foundation
   Found op http://www.mijnwoordenboek.nl/EN/crossword-dictionary/roadbed/1
   
   

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