The government has stepped in and will now be requiring airlines to let passengers deplane if tarmac delays exceed 3 hours. Failing to do so can cost the airline $27,000 per passenger. This is a good move. I think 3 hours is a reasonable time limit. Thoughts?
http://www.nytimes.com/reuters/2009/12/21/business/business-uk-usa-airlines-rights.html
http://www.nytimes.com/reuters/2009/12/21/business/business-uk-usa-airlines-rights.html