Check out all the info at SDCC.info:

LES BRDG CLOSED 12AM-4AM
JUNE 19 THRU JUNE 24

We have reached that point in the construction schedule where we need the gantry crane that is currently stored on the north side of Shore Drive to be put in place so that the superstructure of the new eastbound Lesner Bridge can be assembled.

To do this, we need to temporarily close Shore Drive to slide the gantry over the roadway and into position on the south side of Shore Drive.

This move will be conducted over three nights: June 19th, 20th, and 21st.

We will need short-term closures of Shore Drive between the hours of 12 midnight and 4 am, so as to disrupt as little traffic as possible. Note: One lane of the bridge will be kept open for use by emergency vehicles. In the event that emergency vehicles need to cross the bridge during this time, work will be temporarily halted to let the emergency vehicles cross the bridge. The detour route for all other vehicles during these dates and times is provided below.