It happened just after 3 a.m. Tuesday on the northbound lanes of Route 1 near Route 273 in Christiana.
The truck was carrying ash, a byproduct of burned-off coal.
The ash is sticky and making it difficult for road crews to remove.
The crash shut down both sides of Route 1 for a period time. The southbound lanes were opened around 5 a.m. The northbound lanes remain closed.
Chopper 6 showed traffic backed up approaching the scene. Drivers were being diverted off of Route 1.
No injuries have been reported.
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