All P-plate drivers will be banned from using their mobile phones for at least three years, even hands-free or in speaker mode, under a range of new restrictions to reverse what NSW roads minister Duncan Gay called a "heartbreaking" spike in the rise in fatal accidents among young people.

Other measures include punishing "naughty kids" with a six-month extension of their Ps every time they are suspended for speeding or other unsafe driving.

17-year-old Reilly King's father, Adrian, taught his son to be an extra cautious driver. Credit:Cole Bennetts

So far this year in NSW 21 young people have died in crashes involving P-plate drivers: "That is more than a rugby team that won't come home because of accidents which could have been avoided," said Mr Gay who announced the extension of ban on mobile phone usage to green P-plate drivers as well as red P-platers.

New P-plate drivers die at twice the rate of all drivers, although they comprise only 10 per cent of all drivers. Fatal crashes involving young people rose dramatically across Australia last year to 233 after falling between 2003 to 2014.