  The Transition Radiation Tracker is a combined tracking and electron
identification detector, which is part of the ATLAS Inner Detector at the CERN
LHC. Tracking is carried out by drift tubes, while the interleaved radiators
produce detectable X-rays when electrons traverse them. The status of the
construction and quality control tests will be discussed. The results of beam
tests performed on detector prototypes and the expected performance in ATLAS
will also be reviewed.
