By Katie Todd of RNZ
Family and friends of two teenage sisters killed by a fiery car crash on Christchurch's Port Hills are pleading for guard rails to be installed at the site.
Sunmara Alexander, 16, died in hospital on Friday, two weeks after her 17-year-old sister Tayla died when the car they were in plunged down a bank.
An online petition calling on the Transport Agency and Christchurch City Council to make Summit Road safer, and asking the government to consider better education on driver safety for under-25s, has collected 2600 signatures in one day.
The petition was started on behalf of the girls' father by family friend Kelli Foster, who said she was aware of young people racing cars on Summit Road and it was time for change.