A crash on Auckland's Southwestern Motorway is causing delays for Sunday morning commuters.

A motorist told the Herald it appeared a car had flipped upside down and was in the scrub on the side of SH20, heading westbound by the Puhinui Rd off ramp.

A crane is currently working to remove the vehicle.

NZTA Traffic cameras show traffic bumper to bumper in the two lanes on SH20. Photo / NZTA
NZTA Traffic cameras show traffic bumper to bumper in the two lanes on SH20. Photo / NZTA

"Traffic is at a standstill and some [people] are trying to cross a verge to get onto clear on ramp rather than sitting in queue," she said.

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"Wouldn't be surprised if there's another crash if they keep doing that."

NZTA traffic cameras show traffic bumper to bumper in the two lanes on SH20.

More to come.