The Supreme Court turned down the appeal on Monday of Yaron Bracha, the man sentenced to 16 years imprisonment in 2008 after being convicted of the manslaughter of his twin brother and five Egged employees in a deadly road accident.
Bracha, who had a history of driving offenses, had consumed cocaine, marijuana and alcohol before driving through a red light at Ginaton Junction at 171 kilometers per hour.
He smashed his car into an oncoming vehicle, killing his twin brother, Eyal, who was in the passenger seat.
Five Egged employees, who had been driving home from work, were also killed in the accident.
A panel of three Justices, Asher Dan Grunis, Elyakim Rubenstein and Esther Hayut, turned down Bracha's appeal for a lower sentence.
Bracha's defense team had argued that the District Court had erred by sentencing him to separate punishments for each of the victims, even though there was only one accident.