Fire killed at least 11 people, and closed this tunnel too for foreseeable months ahead.
The tunnel closed in the 1960s because it was too small to allow the line to be electrified, he said.
Queensway Mersey Tunnel will be closed to traffic in both directions until 06:30 BST on Tuesday to accommodate the festival.
Motorists are being warned that the Queensway Mersey Tunnel will be closed to all traffic in both directions from 2200 BST on Saturday until 0630 BST on Tuesday to accommodate the festival.
The mayor said subway traffic and other forms of public transportation were "almost back to normal, " but street traffic remained a mess as more commuters returned to work and some entrances to the city, like the Holland Tunnel and Brooklyn-Battery Tunnel, remained closed.
In March 1999, one of these, the Mont Blanc tunnel into France, was closed by a fire, which killed 39 people.
The Hugh L. Carey Tunnel is flooded from end to end and the Queens Midtown Tunnel also took on water and was closed.
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Bridges and tunnels were closed across the region, including the Verrazano-Narrows Bridge, the Holland Tunnel, the Tappan Zee Bridge and all spans across the East River.
The 1.7 mile-long (2.7km) Butterley tunnel, which carried the Cromford canal, was opened in 1794 and closed in 1900 after a partial collapse.
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"You could have a 10-lane tunnel and if there's a crash it's going to be closed, " he said.
The eastbound carriageway was closed so the vehicle could be recovered and a structural assessment of the sub-station and tunnel carried out.
BBC: Heavy traffic on the M4 between J28-29 on Friday morning
Part of the M20 in Kent remains closed as police and port officials continue to regulate freight traffic heading for Dover and the Channel Tunnel.
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