wheels into a usable format Regulatory compliance in the United States In the United States, the Federal Railroad Administration (FRA) maintains a fleet of three geometry cars as part of its Automated Track Inspection Program (ATIP). The FRA runs its fleet of geometry cars around the country to check railroads for compliance with Federal Track Safety Standards (FTSS). According to the FRA, each geometry car travels approximately 30,000 miles and finds approximately 10,000 defects every year, which are then fixed by the railroads. Future In the United States, railroads are looking into new ways to measure geometry that cause even less interference to train operations. Testing performed by Transportation Technology Center, Inc. (TTCI) at the Transportation Technology Center in Pueblo, Colorado, uses a portable ride quality monitoring system attached to a standard freight car. TTCI has also been promoting a move to "Performance Based Track Geometry" or PBTG. Most current track geometry systems only look at the condition of the track itself, while a PBTG system also looks at vehicle dynamics caused by track conditions. Examples United States – Federal Railroad Administration DOTX-216, -217, -218, -219, -220 – SNCF TGV Iris 320 – ICE S – Doctor Yellow – New Measurement Train, British Rail Class 950, London Underground Track Recording Train – SVGP-1 – TCDD HT80001 (for high speed electric sections only) in – Standard gauge AK track recording cars See also Cant (road/rail) Coordinate-measuring machine Rail inspection Rail tracks Track gauge Track geometry References External links Federal Railroad Administration – Automated Track Inspection Program (ATIP) Example Track Geometry Data – Taken after the 2008 Chatsworth train collision Maintenance of way equipment Track geometry car