As Metro seeks to gain a much more complete and detailed "picture" of its track conditions, Metro has selected ENSCO, Inc., to develop and construct a special rail car known as a track geometry vehicle, which is used to inspect track conditions and identify any possible flaws. A track geometry vehicle is an automated track inspection vehicle that can test several geometric parameters of the track without obstructing normal passenger rail service. The parameters generally measured include track position, curvature, distance between the rails, alignment, smoothness, and the crosslevel of the two rails.
The vehicle uses a variety
of technological sensors, measuring systems, and data management systems to
create a profile of the track being inspected. The new track geometry vehicle
will allow Metro to conduct more comprehensive and frequent track inspections
throughout the entire 106-mile Metrorail system during the day and when the system
is closed. It will allow Metro to secure data and identify any areas where
major repairs might require immediate attention, such as the identification of
cracks or other flaws in the running rails or third rail.
"The new track
geometry vehicle will advance the overall safety of the Metrorail system, which
is our highest priority," said Dave Kubicek, Metro acting deputy general manager
for operations. "This vehicle will enhance our track safety oversight capabilities
and help ensure the safe movement of our customers each day."
Currently, track geometry
testing of the 106-mile rail system is conducted several times a year by an
outside contractor using hi-rail vehicles after the rail system closes for the
night. When the hi-rail vehicle detects a worn-out piece of rail, Metro
officials replace it. In addition to the overnight testing, track inspectors
also visually inspect the rails twice a week to ensure the reliability and
safety of the rail system.
"We’re delighted with this
opportunity to significantly contribute to Metro’s enhanced safety performance
efforts," said Boris Nejikovsky, ENSCO’s vice president, applied technology and
The $7.8-million track
geometry vehicle is expected to be on site in spring 2012.