By CBS3 Staff

PHILADELPHIA (CBS) — A heads up for drivers on I-95. Expect overnight traffic interruptions through Saturday morning.

PennDOT is installing overhead signs as it prepares to open the new ramp at the Girard Avenue interchange Saturday.

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From 8 Wednesday night until 5 a.m., traffic will be stopped periodically for 15 minutes, on Southbound I-95, between the Betsy Ross Bridge and the I-676 interchanges.

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The same will happen Thursday into Friday morning.

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Overnight Friday, expect closures and detours as the traffic pattern is changed.