Ten-year-old Arron and his brother Ben, eight, were killed when the Plymouth Argyle goalkeeper's Range Rover hit their people carrier on the M6 near Stoke-on-Trent in June.
Two weeks ago, when the government announced new measures to crack down on speeding motorists and drink and drug-drivers, the couple said the plans were too little, too late.
"It's Christmas coming up and you know all those people are going to go out, get drunk, get in their car the next morning and not think of the consequences they are going to cause," Mrs Peak said.
She called for Britain to come into line with countries such as Sweden and Poland, which have an extremely low legal blood-alcohol limit.
Earlier last month, at the launch of a Road Safety Week in Manchester, Mrs Peak said: "The current level is not working. If lower levels can work in the European Union and Australia, I don't see why they can't work here.
"Gordon Brown should pay more attention to his own back garden rather than worrying about what's going on in the rest of the world."
McCormick is serving a seven-year sentence after admitting causing death by dangerous driving and drink driving.
According to the Department for Transport, 3,059 people were killed and 28,871 seriously injured on the roads last year.
The British Medical Association (BMA) backed the Peaks, saying a lower legal blood alcohol limit was needed to cut road deaths.
Dr Vivienne Nathanson, the BMA's head of science and ethics, said: "The science is clear: a 50mg limit would lower the number of road crashes, deaths and serious injuries on our roads."
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Showing comments 1 to 4 and replies | View All
Ace Shakespeare , manchester (01/12/2008 at 12:32)
Ace Shakespeare , manchester (01/12/2008 at 12:34)
Iain Monks (01/12/2008 at 14:04)
As far as I know, the danger on our roads isn't the people who have a drink but take care to stay within the limits, but is from those who willfully ignore the limits and drive anyway kn owing they are unlikely to get caught.
The answer is to have more traffic police on the streets to enforce the current laws.
james schofield (01/12/2008 at 14:05)