These include more money for office buildings, improvements to the A38 and a high-speed rail station close to the city.

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Railtrack's Network Management Statement, published earlier this year, indicated where it wants to spend money, and both the regulator and the new Strategic Rail Authority will be keeping a close eye on the company to make sure it spends its new money wisely.

BBC: Review aims to put investment on track

The site in question is derelict industrial land bordering Rainham Marshes, close to the route of the proposed Channel Tunnel rail link.

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For things that clearly do have the springlike quality of shifting irreversibly if pulled (or pushed) too far, like the collapse of ice sheets or the melting of permafrost, a boundary system that seeks to stop you getting too close to the threshold seems as sensible as a safety rail is on a parapet.

ECONOMIST: The global environment

Network Rail said the surest way to prevent any accidents was to close level crossings.

BBC: Level crossings: Wales safety work after 33 near misses

Close collaboration with states is especially important because major infrastructure projects like bridges, rail lines, and waterways often involve both Federal and state agency permits.

WHITEHOUSE: Office of Intergovernmental Affairs Blog

Rail services were cancelled between Fareham, Havant and Portsmouth Harbour, after a gas main close to the railway line was damaged.

BBC: Trains cancelled after Portsmouth gas leak