Vazrazhdane has called for personal responsibility for any failings found after two serious pile-ups on the Trakia motorway near the Zimnitsa junction, close to Yambol. The party's press office said so in a statement.
The crashes happened today in thick fog. Prime minister Rumen Radev told reporters in Varna that 11 people died and 48 were injured.
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Vazrazhdane wants a full and open investigation, and says the institutions must explain publicly what they did. It also wants a check on whether all possible safety steps were taken in the bad weather, and whether the institutions reacted in time.
"We do not accept that the loss of human life should be followed by institutional silence, blame-shifting and forgotten promises," the party wrote.
It says the government and the institutions should not wait for another tragedy before they act. People must be able to rely on safe roads, proper signs, timely warnings and checks that work. "There must be responsibility for work that was not done," the party insists.
The worst result of the tragedy is the loss of human life, Vazrazhdane says. Behind the figures are families, parents and children whose lives change for ever.
The party sent condolences to the families and friends of the dead and wished the injured a quick and full recovery.