It happened shortly before 4 p.m. Monday.
Video from Chopper 6 HD showed a tree service truck overturned on the highway while a tractor-trailer was stopped nearby.
The tractor-trailer was stopped nearby with front-end damage. It appears the truck hit a piece of equipment being towed by the tree service truck.
There was no immediate word on any injuries.
Chopper 6 video of crash on I-495 in Delaware
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