Side-mounted sensors detect and measure parallel-parking spaces for parking-assistance systems.

ECONOMIST: Rational consumer

The road will cross a small stream and continue parallel to the stream for some time before the first blue cross appears on the side barrier of a small cement bridge.

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On the down side, opponents point out that the A1 motorway and the TGV line are already saturated, so new parallel services will have to be built - adding to the nine billion euros that the airport will cost.

BBC: Paris plans third airport