Alice Springs is cut off from the south by floods and the swollen Todd River is restricting vehicular movement in the town, with low-level causeways expected to remain closed for several days.

The casino causeway, Stevens Road, is expected to be reopened today.

Police are still monitoring the river level through the town, even though it has dropped from its overnight peak and the flood threat has eased.

Senior Sergeant Rob Farmer says the river level has risen again in the past hour, but not significantly, and police expect it will drop throughout the day.

However, he says as well as roads in the town, most access routes are inundated.

The Stuart Highway north of Alice Springs is open at the moment only to trucks and to 4WDs with extreme care and the Stuart Highway south of Alice Springs is cut at several places.

The Transport and Works Department says the Plenty Highway is also impassable.