A young Sydney girl who survived a deadly meningococcal infection has been reunited with the emergency crews who saved her life using a rarely deployed green light corridor system.

At just two years old, Odelia was a happy, healthy toddler when one small bruise changed everything.

WATCH THE VIDEO ABOVE: Green light corridor saves toddler’s life

Know the news with the 7NEWS app: Download today

“My stomach just dropped and I just thought, oh my gosh, like, we need to call an ambulance,” her mother Katrina Kuzmanovic said.

Odelia had contracted a deadly meningococcal B infection with a rash spreading rapidly.

“I was watching that rash that was spreading right before my eyes and we then began administering IV antibiotics,” paramedic Wayne Wallace said.

Odelia was a happy health toddler when a bruise appeared. Credit: 7NEWS

The bruise that sparked an emergency. Credit: 7NEWS

She was rushed to Campbelltown Hospital where doctors kept her alive, but she needed specialist help on the other side of the city.

“We were then able to arrange a green light corridor to be able to save time for Odelia when she was critically unwell,” said Kathryn Browning Carmon, from the newborn and paediatric emergency transport service.

A green light corridor is a system used only in the direst of emergencies that sees police, paramedics and traffic teams work together to part a path through gridlock traffic.

Inspector Greg Donaldson from Highway Patrol recalled clearing the path down the highway as they raced Odelia to Randwick in record time.

“We just worried about getting her there as fast as we could,” Donaldson said.

“Normally a 45-minute run and we got her there in 24 minutes.”

“I remember seeing urgent medical escort going down the highway, just clearing the path,” Kuzmanovic said.

Parents Katrina and Andrew Kuzmanovic Credit: 7NEWS

Odelia with her parents. Credit: 7NEWS

That speed saved her life, though she spent months in Sydney Children’s Hospital and the infection claimed her hands and feet.

An online fundraiser has seen $55,000 donated, with more needed to support her recovery.

At just three years old, Odelia is now learning how to walk again.

“It’s amazing to watch your own child that has lost their limbs just adapt so fast,” her father Andrew Kuzmanovic said.

“Just to support her to whatever she’s going to be is my privilege.”

Odelia with her dad in hospital. Credit: 7NEWS

Odelia lost her hands and feet after the infection. Credit: 7NEWS

The life-saving system is coordinated from the Transport Management Centre, where thousands of traffic lights statewide can be turned green at the touch of a button.

“In an emergency event, seconds count,” Troy Davidson from the Transport Management Centre said.

A year on, Odelia had a tea party with the team who helped save her life.

“All the decisions that everyone made that day are the reason why Odelia is here today,” her mum said.

“They’ll just forever be a part of her survival story.”