Tributes to Abi and Mia Houston after A9 death crash near Kingussie Tributes have been paid to an occupational therapist and her daughter who were killed in a crash on the A9 in the Highlands. Abigail Houston, 42, was travelling with her husband, Andrew, and two young girls when their Audi A4 collided with a Jeep near Kingussie on Tuesday evening. She and her seven-year-old daughter Mia died at the scene of the crash, along with a man in the Jeep who is believed to have been a German tourist. Mr Houston, from Edinburgh, and his other daughter Lily were taken to Raigmore Hospital in Inverness for treatment. In a statement issued through Police Scotland, the family said: "It is incredibly difficult to find the words to express the loss that we are feeling. Abigail was such a bright and vivacious woman who lived life to the full, adored her family and was greatly fulfilled through her work as a paediatric occupational therapist. Mia was a delightful and beautiful little girl who enjoyed school and activities but, most of all, loved her family and friends. Neighbours in the Trinity area of Edinburgh earlier described the Houstons as a "perfect family." One said: "It is absolutely awful, we are all in shock. Police have appealed for witnesses to the crash, which happened at about 5.45pm on Tuesday. The crash has prompted fresh calls to bring forward a programme of improvements to the A9 which would see 80 miles of road between Perth and Inverness dualled by 2025. Chief Superintendent David O'Connor said: "There have been other major capital investments made across Scotland for sound economic reasons. However, people are continuing to die and be seriously injured on the A9 with depressing frequency. Is this the case in some of the other projects? This needs to be looked at with fresh eyes and explored to see if it can be given a higher priority.