Transit Testing

Holland also operates a Transit Testing hi-rail vehicle (TTV) that is designed specifically to accommodate the unique conditions on transit systems, including broad gauge, tight clearances, and tight-radius curves (up to 70 degrees). TrackSTAR 491 also incorporates a mini load axle to identify areas with poor tie/ fastener conditions.



  • 491TTSSide
  • 491TTSFront
  • 491-tts-1side