Crews had worked Tuesday and throughout the night to pave a temporary bridge to replace an overpass that was destroyed by the crash.
The section of I-95 - the main highway between New York and Boston - was heavily damaged when a tanker truck carrying heating oil struck a concrete barrier March 25 and burst into flames. The fire burned for two hours at temperatures hot enough to cause the structural steel in the overpass to sag.
Officials initially had said it might take weeks to repair the bridge, which is used by 120,000 cars each day.
But the northbound lanes were reopened Sunday night, while the southbound side was opened at about 3:30 a.m. on Wednesday, said Chris Cooper, a spokesman for the state Department of Transportation.
Even though traffic was moving smoothly during the morning commute, State Police Sgt. J. Paul Vance said drivers could still expect delays and narrow travel lanes.
``It's definitely tight,'' Vance said.
No one was seriously injured in the crash. State police are still investigating and no charges have been filed.
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