In front of them sat experts from campaigning bodies, transport research and the police - all ready to get into a proper discussion - and yet the MPs demonstrated that they didn't even know the most basic of facts.
Evidence and statistics were bypassed in favour of opinions and anecdotes on sideline topics.
Such a clear demonstration of lack of research and understanding at this level of seniority would, in any other business, be classed as negligent.
More top news
Train, tube and tram passengers can use bank or credit cards to swipe open ticket barriers from today.
The Rightmove September House Prices survey is out today, revealing how house prices are changing in every London borough.
TfL has announced plans to redevelop 55 Broadway, the historic home of London Underground. But the plans are under fire from Labour.