Begin reading at the wrong base and the whole message will be gobbledegook which could easily include false start and stop signals.

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The "advanced active safety research vehicle" prototype uses ITS and existing Toyota technology to monitor whether the driver is awake, to keep the car on the road, and to stop at traffic signals.

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The other three codons are signals to stop making the chain.

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Lawson is now fighting off a budgetary collapse of this high desert town of 2, 100, where the paved and gravel roads have no traffic signals, only stop signs -- and even those are so faded from the sun that the village would like to replace them if it had the money.

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Cycle track traffic signals alert cyclists when to stop or go.

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"Everything that we have learned with multiple thousands of patients, signals there is no rebound" after patients stop taking Avastin, says William Burns, head of the company's pharmaceutical division.

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But stop-and-start policy cycles would send the wrong signals.

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The signals that indicate where the copying machinery should start and stop, which is a good working definition of where on a chromosome a gene begins and ends, are imperfectly understood.

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The project is partly-funded by the U.S. military and has taken the hand-signals already used by soldiers as inspiration for the symbols on the vest -- such as stop, run, turn left or turn right.

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