The NXGen Rail Geometry Train works it was south along the Houston Subdivision. NXGen is one of a few private rail & roadbed inspection companies in the industry.
From what I have witnessed on a few different railroads, first the railroad inspects their trackage with their track geometry equipment. Then an independent firm such as NXGen checks the route, and finally the FRA/DOT checks the route.
Burlington Northern Santa Fe
Gulf Division
Houston Subdivision
MP 136.4 - CR 167 gc
Singleton, Texas, USA
15 December 2015 - 09:45 CST
BNSF Geometry Train (sb)
BNSF #7816 [GE ES44DC]
NXGX #380 "Michael D. Harding"
BNSF #86
BNSF #85
? 2015 - Philip M. Goldstein