Land mass collapsed due to heavy rains at Chabua Amirejibi highway, where fortification works of rocky slope were underway, the Tbilisi City Hall reported.
Traffic will be fully restricted till 6 p.m. from the tunnel to Tamarashvili Street.
Drivers can use Kakutsa Cholokashvili, Sulkhan Tsintsadze and Mikheil Tamarashvili streets.