The father of one of four teenage girls killed in a car crash on a mountain road has called for major changes in how young people are licensed to drive.
The four girls were rear-seat passengers in the crashed car
Terry Jones' daughter Louise, 16, died along with three friends when a car driven by a 17-year-old boy came off a road near Ebbw Vale last week.
He said: "The driving test is not worth the paper it's written on".
Mr Jones said new drivers should take a 200-hour course, with extra tuition to drive passengers.
The girls - Louise and Kayleigh Parry, both 16, and 15-year-olds Katie Roberts and Danielle Caswell - were in the backseat of a Vauxhall Corsa being driven by a male friend.
Speaking at a press conference on Tuesday, Mr Jones said he wanted young people to learn from the crash, which happened shortly after the group had left his house.
The girls died shortly after they left Terry Jones' house
He said: "Even after this incident we've seen young people driving seriously recklessly.
"It's as if no warning has been taken. I want to warn all these young girls if they get in the back of cars with young boys driving, they need to realise there is a problem because the boys are going to do what we think this one has done, and show off and come unstuck.
"It's nothing that we didn't do as youngsters but we were lucky."
He called for a pilot-style driving course on which young people would have to log 200 hours before being allowed to drive alone and further 100 hours' tuition before they could carry passengers.
He said: "It is possible for a young chap, or a young girl for that matter, to get to their 17th birthday and their parents purchase a crash driving course and from not being able to drive, within five days they've passed their driving test.
"They can go from nothing to driving the most powerful cars on our road and that is without having any instruction on the motorways."
Mr Jones, who was with wife, Georgina, and their son Christopher, stressed that he did not have any ill-feeling towards the car driver, who survived the crash along with his 17-year-old front-seat passenger.
Kayleigh Parry, Katie Roberts, Danielle Caswell, and Louise Jones
The girls who died were all pupils at Glyncoed Comprehensive School.
Also at the press conference at Ebbw Vale Rugby Club were Kayleigh's father, Carl Warren, and Katie's cousins, Fay Wheeler and Jane Thomas.
Mr Warren said: "Kayleigh was my little girl and she will be truly missed."
Ms Wheeler, speaking for Katie's family, said: "Katie was a beautiful girl, an inspiration to us all. We all miss her and all love her".
Mr Jones said the girls' funerals would be held on the same day.