If I was the Mayor

If I was the Mayor of London I would make an east to west car boat service. This is how it would work. There would be a dock in West London in the Richmond area and there would be another in Greenwich perhaps a third and forth in Gavesend and Southend. The boats burn the same fuel is 9 cars but they carry 50 cars. Tickets are £3 per car, about the cost in fuel you would spend waiting in congested traffic for an hour and there would be a space at the back of the boat to rent out for a restaurant chain like subway. 

Cars would drive and park on the boats and then the boats would move the cars across London from East to West and West to East. There would be about 25 boats running along the whole route so over a thousand cars would be taken off the road while the service is running. 

People would park on the boats and cruise the river and leave their cars if they wish to sit in the cafe area and relax. The boats would be closed off to ensure that no trash drops into the River Thames but there would be windows in the boat to allow people to look out and enjoy the view.