| Business | Phone |
| Stammer Transportation 212 Derby Glen Ln, Brentwood 37027 | (615) 371-1587 |
| Clinard Engineering Assoc 5210 Maryland Way, Brentwood 37027 | (615) 370-6079 |
| Rpm Transportation Consultants 214 Centerview Dr # 240, Brentwood 37027 | (615) 370-8410 |