Mr Hammond said the Hindead Tunnel was one of the missing links in Britain's trunk road network.

BBC: Hindhead Tunnel

As the bridges are part of the motorway and trunk road network, this would be the responsibility of the Welsh government.

BBC: Concern over Briton Ferry M4 and A48 bridge fall deaths

For instance, it provides asphalt and road surfacing services for the Highways Agency trunk road network and it picks up rubble from demolition jobs.

BBC: UK economy: Two views of the recession

Most of the money will be spent on easing bottlenecks on the motorways and trunk-road network by widening 360 miles of road, roughly 5% of the total.

ECONOMIST: British election briefing: Transport

Throwing up barricades to block the country's limited network of trunk roads is a traditional, and effective, means of protest in Bolivia.

ECONOMIST: Bolivia

The Delphi connectivity system's key fob service operates over the Verizon Wireless network or via Bluetooth to remotely lock or unlock doors, open the trunk, start or stop the engine and operate a panic horn on select vehicles.

ENGADGET: Delphi and Verizon launch new connectivity system: track and monitor your vehicle through your smartphone