THE second car accident within a week to involve a vehicle trying to evade police has sparked a warning from authorities.
Police have warned it was lucky that innocent motorists were not injured or killed in either of the two incidents to occur this week.
A woman remains in a critical condition in hospital after the vehicle she was travelling in smashed into the back of a parked b-double tanker at New Chum about 4am yesterday.
The 30-year-old was one of six people travelling in the five-seater Ford Falcon, which only minutes earlier had sped away from a police crew that tried to pull the car over near the Redbank Plains Shopping Village.
In circumstances strangely similar to those surrounding a crash on the Cunningham Highway at Yamanto on Monday, police intended to pull the vehicle over to check if it was stolen - even though it turned out not to be.
Up until the white Ford Falcon sped away from the police outside the shopping centre, the only offence being committed was that of a passenger not being properly restrained.
Ipswich police Inspector Keith McDonald said the crew did not pursue the vehicle, but instead pulled over to the side of the road near the church soccer grounds on Redbank Plains Rd, and called for assistance from other units.
"Half an hour earlier there had been another evade police incident, involving a silver Ford, at Goodna," Insp McDonald said.
"This white Ford was then seen exceeding the speed limit up near McDonald's at Redbank Plains, and police believed it may have been the same vehicle."
A set of stingers was laid across the road about 100m ahead of the large roundabout at New Chum, intending to stop the vehicle as it headed towards Blackstone.
The male driver, aged 20, steered up onto the grass shoulder to avoid the stinger, crossing several gardens and hitting a road sign as he negotiated the roundabout.
At some point, the car's oil sump was broken, and at least one of the tyres was blown.
A large oil trail was visible from the roundabout up to the point of impact, about 400m further west along Redbank Plains Rd.
Insp McDonald said the most seriously injured of the six people was the 30-year-old woman who was sitting on the lap of a person in the back seat.
She sustained a serious head injury which has caused swelling on one side of the brain, as well as a broken ankle, and remains in the Princess Alexandra Hospital in a critical but stable condition.
The driver also sustained serious injuries, including a large cut to the head, fractured ribs and a collapsed lung.
He was in the Princess Alexandra Hospital in a stable condition and police are likely to speak with him when his condition improves.
Two of the remaining four injured were taken to the Royal Brisbane Hospital, while the other two went to Ipswich Hospital.
The incident followed a crash at Yamanto on Monday, involving a car which police had intended to pull over in relation to a break and enter in Rosewood.
It later emerged that the vehicle and its occupants had no connection with the break and enter, yet the driver tried to evade police regardless.
Insp McDonald said the driver could have saved a lot of heartache for the families involved if he'd pulled over straight away.
"We have been fortunate that other innocent motorists were not killed or injured in either of the incidents this week," Insp McDonald said.
Insp McDonald said police, including the Forensic Crash Unit and members of the Property Squad, would conduct a thorough investigation of yesterday's incident and the vehicle involved.