VANCOUVER – Discovery Canada has commissioned an eighth series of Highway Thru Hell from Thunderbird Entertainment Group.Highway Thru Hell follows the heroes of the highway as they fight to keep some of the most economically important and inhospitable trucking routes in North America open to traffic. The current season airs Tuesday nights on Discovery Canada.Thunderbird has produced more than 100 episodes of Highway Thru Hell and its spinoff series Heavy Rescue 401. The series can be watched in over a dozen languages in more than 170 countries."With its up-close look at extraordinary wrecks and nail-biting rescues, Highway Thru Hell is...