Virgin Media and London Underground engineers continue to test and prepare the forthcoming WiFi service, including recent capacity testing at Chancery Lane underground station where hundreds of devices were connected to the station's WiFi service at exactly the same time to reproduce the service experience of a busy Tube train arriving at the station2.

ENGADGET: Virgin Media names the first 80 tube stations to get WiFi hotspots

New slip roads, a bus lane, extra train capacity and appeals for commuters to use public transport and to car share were put in place in an attempt to limit congestion.

BBC: Kessock Bridge

The investment bill could rise yet more because of a change in the pattern of trade: in 2014 the Panama Canal opens a second lane, doubling its capacity and allowing it to carry bigger container vessels and bulk ships.

ECONOMIST: American railways

Spurs chairman Daniel Levy had defended the club's ambition to move to Stratford by stating very clearly that staying in Tottenham - and following an original plan to develop White Hart Lane which would increase the capacity to 58, 000 - is not financially viable.

BBC: Where now for Spurs?

In the late 1970s, the Mexico city government increased the capacity of the Viaducto, a four-lane motorway, by re-painting lines to make it six lanes wide in effect, a 50% increase in capacity.

ECONOMIST: The perils of percentages

After a year the Viaducto was changed back to a four-lane road a 33% capacity reduction.

ECONOMIST: The perils of percentages