FORT LAUDERDALE, Fla. -

Work began Monday on an underwater sea wall to protect Fort Lauderdale beach and State Road A1A from further erosion.

Part of the road and sidewalk were swept into the ocean by high tides during and after Superstorm Sandy in November.

Crews are driving steel piles into the ground offshore between NE 14th Ct. and NE 18th St.

"Once the sheet piles are all in place, they'll prevent any further erosion of the A1A in this particular area," said Barbara Kelleher with the Florida Department of Transportation.

The road remains open during the construction, but the speed limit has been reduced to 25 mph.

The road will look different after construction is finished. Instead of two lanes in each direction, there will be one driving lane, along with bike lanes and a center turning lane.

The construction is supposed to be finished by the first week of May. Officials say nearby residents may experience noise and vibration during the construction.