| Business | Phone |
| Econorail Corp 2355 9th Ave, Houston 77002 | (713) 224-2101 |
| Balfour Beatty Rail Inc 13922 Force St, Houston 77015 | (281) 457-2410 |
| Bayou City Rail 14507 Kenny St, Houston 77015 | (713) 330-1600 |
| Earl Campbell Construction Co Houston 77029 | (713) 674-8477 |
| Mbi 8825 Mississippi St, Houston 77029 | (713) 676-1559 |
| Inter-Rail Transport Inc 20909 E Hardy Rd, Houston 77073 | (281) 821-2431 |