Traffic jams in Belfast. Just how bad are they? And what can be done? #BBCNolan

Just how bad are Belfast's traffic jams? Well, the city has the worst jams in the UK, according to a new survey. It says journeys here take up to 82 percent longer in rush hour traffic. The survey by sat nav company Tom Tom puts Belfast at the top of a list of 17 of the UK;s most congested cities. That's worse than London and Birmingham. Is it really that bad? And is the answer getting more of us out of our cars and onto buses and trains? Stephen gets the views of Green Party Councillor Ross Brown, Arthur Acheson who is an architect and planner and we take your calls