1 dead in crash on I-476 North in Delaware County

RIDLEY TOWNSHIP, Pa. (WPVI) -- One person is dead following a crash that slowed traffic on the northbound Blue Route (I-476) in Delaware County.

It happened at 7:40 a.m. Thursday on the on-ramp from McDade Boulevard in Ridley Township.

Police say a vehicle left the road and went up an embankment.

Images from Chopper 6 HD shown on Action News at 7:55 a.m. showed a single vehicle adjacent to the ramp covered with a yellow tarp.

There was no immediate word what caused the driver to lose control.

That person was pronounced dead at the scene.

The on-ramp from McDade Boulevard to I-476 North was completely shut down as police investigated.

Traffic on the northbound Blue Route was backed up onto I-95 for more than an hour.

Stay with Action News and 6abc.com for more information as it becomes available.