Olivia Dewar, 17, started showing signs of improvement on Christmas Day to the delight of her family who were keeping a vigil by her bedside.
The teenager managed to move her limbs and face while looking around, although she remains too heavily sedated to recognise anyone.
A friend said: "The change in her was amazing. She looked so much better than the first time I saw her.
"I can only attribute this to the spirit of Christmas. It is still a slow process but I am sure she will make it. If anyone can come through this, it is her."
Olivia was struck by the vehicle in the village of Saar as she crossed a road from the Lamees Gardens residential compound on her way to a local supermarket, it is believed.