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52550
  
  

  1
Jan
1974
Other Reports
Eighth Report on the Railroad Technology Program
Author
          Federal Railroad Administration

Subject
                    Best Practices,
                    Intelligent Railroad Systems

**Keywords:** Research and Development, Safety, Railroad Research Information Service
**Abstract:** This annual report by the Secretary of Transportation serves as an information source for those having a technological interest in FRA's research, development and demonstration...
Office
              RRD
    1
Jun
1968
Other Reports
Review of Effects of Hypervelocity Jets and Projectiles on Rock
Author
          George B. Clark, Charles J. Haas, John W. Brown, Clifford D. Muir

Subject
                    Facilities & Test Equipment,
                    Intelligent Railroad Systems,
                    Tracks & Structures

**Keywords:** Excavating Equipment, Mining, Tunnels
**Abstract:** New methods are being continuously sought which will radically increase the rates of tunnel excavation. Attention has turned to the use of hypervelocity impact as a means of...
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