NO.Causeway ST 5.jpg

Southbound traffic moves through the Lake Pontchartrain Causeway toll plaza Friday, Aug. 12, 2016, in Mandeville.

A portion of left lane of the southbound span of the Causeway bridge will be closed for much of the weekend, according to bridge general manager Carlton Dufrechou.

The lane will be closed between 7 a.m. and 5 p.m. on a hump at the eight-mile marker between the crossovers that come on both sides of it.

Dufrechou urges drivers to reduce speed and be cautious in the work zone.

Follow Nick Reimann on Twitter, @nicksreimann.