its a strange one this to me,dont think its practical/viable for a taxi to carry this gear, whilst can see the point of having one, not many go long distances with kiddies in em, more folk use em that are carrying much luggage, (airports etc) and the luggage space is crammed, if they were actually in the cab it would restrict a full compliment of passengers, can't see how its viable
in fairness the majority are catered for over the minority.