Another factor making demolition tricky in such neighbourhoods, he adds, is the fact that many buildings categorised as yellow and red - properties that are partially or badly damaged - are located very close to those that have been deemed safe - colour coded green.
The other two machines used colour-coded slips of paper and chips of wood to represent information.
The US system of colour-coded security alerts may be scrapped under new plans being drawn up by security officials.
Even Thais who disdain both the rival colour-coded camps smell something fishy here.
Divided into 27 colour-coded sections, those seeking clothes should head for market sections 5 and 6, and then onward to sections 10 to 24.
The task was to work out which colour-coded film containers held some bits of cheese, then prise the containers open and eat the contents.
ECONOMIST: Now, it seems, even the bird-brained have theories of mind
Neither of these is actually true, as would have been clear to anyone who perused the entire news release or dissected the colour-coded key to the map.
The country could be plunged back into confrontational, colour-coded politics.
The city buses are colour-coded to instantly telegraph what type of route they ply: red buses are express, green buses run short routes between subway stations and other points.
In the three elderly care wards at St Thomas's Hospital doors to toilets and washrooms have been colour-coded with bays to give patients visual prompts in finding their way round.
No matter which initiative or investment they announce to great headlines now, many of the colour-coded graphs in this report won't take a turn for the better for a decade, perhaps two.
The heatwave across Australia in recent weeks has been so intense that the Bureau of Meteorology has had to add a new shade to its colour-coded temperature chart, so the scale now reaches above 50C.
BBC: Sydney bakes on hottest day on record as bushfires rage
Using an elaborate system of colour-coded boxes to convey over 170, 000 meals to their destinations each day, the 5, 000-strong dabbawala collective has built up an extraordinary reputation for the speed and accuracy of its deliveries.
The fires have been caused by days of searing heat across much of the country - so much so that Australia's Bureau of Meteorology was last week forced to add a new shade to its colour-coded temperature chart, for heat above 50C.
BBC: News - Australia bushfire destroys homes and damages observatory
The staff - and most of the diners - are dressed in black-and-white in sympathy, and it's probably no accident that by far the most popular of the 80 immaculately presented tortillas on the menu is the colour-coded morcilla de arroz de Burgos: black sausage and white rice.
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