Traffic
piled up after a two-car crack up about 6:45 a.m. on the southbound
Gulf Freeway near Calder, according to Houston TranStar.

One lane was temporarily blocked after the crash and traffic began to stack up immediately.

No information was available about possible injuries or what caused the mishap.

Source: http://www.chron.com/news/houston-traffic/article/Gulf-Freeway-snarled-near-Calder-4611735.php