The third mainland bridge was on Thursday evening shut down temporarily for an investigative maintenance test.
The third mainland bridge is the longest of three bridges connecting Lagos Island to the mainland, the others are the Eko and Carter bridges.
Different government agencies and officials were seen on Thursday night waiting for the midnight deadline before the eventual closure of the bridge.
The Minister of Power, Works and Housing, Babatunde Fashola, was also at the bridge to supervise the closure.
The bridge was closed with concrete barriers put in place and will remain shut down till Sunday, August 26th.
According to the Lagos State government, the Third mainland bridge closure is to allow for investigative maintenance test on the bridge before embarking on proper repairs later.
The state government has therefore appealed for the cooperation, support and understanding of all motorists and residents, and also advised them to minimise non-essential travel and movements during the four-day closure.