The crash happened at around 6:40 a.m. on 495 north near Route 140. Both vehicles involved in the crash rolled over. It was unclear what caused the crash, or if there were any injuries.
SkyFox was over the scene just after 7 a.m., reporting a close to four mile backup.
All lanes of the highway on the northbound side were shut until just after 7:15 a.m., when officials re-opened the breakdown lane to passing cars. Both vehicles were towed away at around 7:30 a.m. and state police opened all lanes to traffic minutes later.
Though the scene was clear, a residual backup remained.
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