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Table 1-2 Automated Track Inspection Program (ATIP) Exceptions(1) per 100 Miles: 2004-2014

Excel

  2004 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014
Profile 4.2 3.4 3.5 3.2 2.4 1.9 2.1 2.4 1.4 17.4 9.9
Alignment 2.7 1.6 1.3 1.7 1.4 1.8 2.0 2.0 1.5 18.4 10.6
Gage 13.6 8.5 6.6 5.1 12.2 7.2 3.1 2.1 4.4 5.9 2.1
Crosslevel 8.7 5.2 5.6 2.0 2.0 2.2 1.2 1.3 1.1 6.9 4.0
Warp 8.1 11.2 6.7 4.7 3.7 4.0 2.8 1.8 1.7 10.9 4.6
Runoff 0.1 0.8 0.7 0.4 0.6 0.7 0.6 0.8 0.4 10.0 8.4
Twist 0.6 5.5 1.9 1.8 1.7 1.5 1.3 1.0 0.8 5.6 3.0
Limited Speed 6.8 6.3 5.9 9.9 9.7 8.7 11.8 3.1 2.6 2.5 1.4
Total Per 100 Miles 38.0 36.1 26.3 28.7 33.7 27.9 24.8 14.5 14.1 77.6 44.0
Miles 34,699 29,051 26,886 59,165 52,997 74,715 83,013 74,541 70,049 62,882 74,202

1 Exceptions mean track did not meet normal operation standards

KEY: ATIP = Automated Track Inspection Program

NOTES: The ATIP program does not provide a comprehensive evaluation of the national rail network on an annual basis due to the limited number of surveying cars. Inspection locations vary by year and are prioritized by factors such as safety risk analysis and operation types. The FRA implemented upgrades to the inspection and collection technology in the ATIP fleet in 2013 which allowed for increased sensitivity of exception detection. Multiple cars surveying except for 2005. Defects are briefly defined as variations from design values for the following track geometry properties:

Profile - rail surface elevations

Alignment - track direction (tangent or curvature)

Gage - distance between rails

Cross-level - elevation difference between the rails

Warp - maximum change in cross-level over a specified distance

Runoff - elevation (ramp) difference of a line along the top of the rail is used for the projection

Twist - rate of introduction and removal of cross-level on transitions from straight to curved track alignment

Limited Speed - reduced operating speed due to track geometry constraints

Detailed definitions and standards may be found in U.S. Department of Transportation, Federal Railroad Administration, Track and Rail and Infrastructure Integrity Compliance Manual, July 2012.

SOURCE: U.S. Department of Transportation, Federal Railroad Administration, Office of Safety, ATIP Statistics (June 15, 2015). Available at http://www.fra.dot.gov/ as of July 2015.

Updated: Saturday, May 20, 2017