Ummeli v Houston ube nesilinganiso esimaphakathi — 5 (ngokwezilinganiso zomsebenzisi Mapich).
Sithole ummeli Houston emigwaqweni elandelayo: Franklin St, Houston St, Smith St, W 16th St, Wood Branch Park Dr, Northwest Fwy, Greenway Plaza, Westheimer Rd, Walters Rd, Southwest Fwy, S Main St, Katy Fwy
Le datha ikhiqizwa kusetshenziswa izihlungi zangokwezifiso ezisuselwe kukho 12 Izinkampani, eyethulwe kuleli khasi.