Continuing project to synthesize information on highway problems.
"A staff digest of the progress and status of NCHRP Project 20-5, "Synthesis of information related to highway problems," for which the Transportation Research Board is the agency conducting the research."
| Egile korporatiboa: | , | 
|---|---|
| Formatua: | Liburua | 
| Hizkuntza: | English | 
| Argitaratua: | Washington, D.C.
          Transportation Research Board
    
        [1985] | 
| Saila: | Research results digest (National Cooperative Highway Research Program)
              no. 148. | 
| Gaiak: |