Three people were taken to the Alice Springs Hospital after being struck by a vehicle on the Stuart Highway overnight.
It is alleged the vehicle was travelling inbound on the Stuart Highway when a group of pedestrians walked onto the road in the path of the vehicle, Northern Territory Police say.
The vehicle slowed but was unable to stop in time before hitting the group.
The driver got out of the vehicle and provided assistance until Police and Emergency Services arrived.
A 47-year-old woman hit the passenger side of the vehicle and was taken to the Alice Springs Hospital where she remains in a stable condition.
Three men, aged 48, 43 and 54-years-old did not sustain any injuries during the incident.
Southern Traffic Operations Unit Sergeant Conan Robertson said the crash was a disappointing way to start National Road Safety Week.
“All road users need to be behave safely and be aware of their surroundings as even a small lapse in concentration can have catastrophic ramifications.
“While not all crashes are fatal many people suffer injuries that change them for the rest of their lives and cause years of pain and suffering. As a community we really need to work together to keep each other safe because the cost of a small mistake can be so high.”