Within a decade, Oyala will house the president, the government and - according to the master plan - up to 200,000 people. Where the inhabitants will come from is anyone's guess. The population of the entire country could fit into the city of Leeds, and the vast majority live far away, close to the coast.
If the constitution passes, elections must take place within three months and the deep polarisation in the country is likely to continue, the BBC's Bethany Bell in Cairo reports.
A number of foreigners have been kidnapped for ransom in the southern Philippines. Areas within the region are used as bases by Islamist militants and rebel groups.
But it seems the cameras would be tightly focused within Deutsche Bahn's own property - people or property outside the depots would not be filmed, so easing any privacy concerns, our correspondent says.
