HOUSTON – The North Freeway reopened after it was closed when several semi-trucks jackknifed on frozen overpasses overnight.

The North Freeway was closed near Cypresswood as crews worked to clear the scene.

Officials with the Houston Fire Department said the roads are deceptive. Overpasses were covered with a sheet of ice making them impassable, while side streets were littered with some smaller, but dangerous patches of ice.

WATCH: Drivers forced to sleep on freeway

In southwest Houston, ice on an overpass on the Southwest Freeway near Hillcroft heading north has traffic gridlocked as drivers wait to get through.

Some motorists waited as much as four hours for it to reopen and were forced to sleep in their vehicles.

RAW: Jackknifed semi-trucks on the North Freeway