There are calls for a shake up to tourism licences following a horrific crash on Indian Ocean Drive on Sunday that killed two Chinese-nationals.

The women had just visited popular tourist attraction, the Pinnacles, and were exiting Pinnacles Drive onto the highway when their Nissan XTrail pulled out in front of a bus.

Witnesses told Nine News Perth the Nissan hesitated in the wrong lane causing the bus, carrying 35 people, to slam into the car at 100 kilometres an hour.

The driver, 24, died instantly at the scene, while one of her passengers, 23, died the next day in hospital.