cross-member vs roadway

cross-member

noun
  • A beam lying crosswise; a rail. 

roadway

noun
  • The portion of a bridge or railway used by traffic. 

  • The main or central portion of a road, used by the vehicles. 

  • A way used as a road. 

How often have the words cross-member and roadway occurred in a corpus of books? (source: Google Ngram Viewer )