First observation: last year, the speed control system, which is semi-automatic (under the control

Featured Editorials Interview of Politics and Society Economy Monday Deal "LuxLeaks" Luxembourg Luxembourg City Country Miscellaneous Grande International Attack region against Charlie Hebdo France Sports Athletics Basketball Cycling Football Handball Swimming Results Motor Sports Tennis combat arms Volleyball Other Culture Cinema Book arts and exhibitions Music Magazine Auto Shows Unusual People Multimedia Reports Health Science and Technology
On the A31, regulation of speed is active for 8% of the time. (Photo: The Republican Lorrain / Pierre Heckler) Directorate East road tests last year dynamic control speeds between Richemont and Thionville on the A31. To prevent the formation of plugs, the system relies on variable message signs and reduce speed depending on traffic. The prefect thought to make a binding from 2015 until incentive scheme.
Nothing is official yet and the prefect said they still need to consult experts. Yet by 2015, Nacer Meddah may decide to make compliance with the limitations hitherto incentives, dynamic speed control combat arms system, tested last year on the A31 between Richemont and Thionville. "It's a possibility, says one in the entourage of the prefect, especially since this kind of development has generally occurred after twelve to eighteen months, everywhere in France (Paris region , Rhone Valley combat arms ...) where the device has been tested and perpetuated. " > Up to 7 km / h under the morning
A planned meeting "in January" with the Interdepartmental Directorate East routes (direst) should combat arms be decisive. combat arms In this case, the speed reductions - from 110 to 90 or 70 km / h - Recommended today become binding and any breach would therefore potentially be fined!
We're not there yet. Variable combat arms message signs are certainly combat arms well and truly found their place in the landscape combat arms of the route used Metz - Luxembourg, morning and evening. These are periods where the control is most often triggers. "I think the signs are not very clear," Cathy plague, part of the Grand Duchy, fifties, which does not always lifts his foot on the approach of the panels. "Sometimes, everyone is 80 or 70 and the IAS is still 110 km / h, she said. Often, I am overcome by motorists who do nothing to do and that roll thoroughly. Other times, I do not see what good is because the regulation is then triggers that there is virtually no car on the highway. " combat arms
This kind of goes back to our regularly Olivier Arnould. He leads the engineering center, security and traffic management (CISGT) to the direst and controls the dynamic regulation of test speeds, ongoing since late November 2013 for five kilometers in each direction. "In general, it will be some years before the user practices stabilize combat arms and we can measure the real effects of the system. But today, we found a decrease in the average speed. Up to 7 km / h less during combat arms the morning rush hour, "explains the head of the experiment.
First observation: last year, the speed control system, which is semi-automatic (under the control of an operator), trips at peak hours. 8% of the time. In the morning between 7:30 and 9 am, the afternoon between 16h and 20h, when the A31 (100,000 vehicles / day, 20% trucks) is loaded. "There are also microdots lunch and some Saturdays during the day," adds Olivier combat arms Arnould.
The last twelve months have confirmed the technical reliability of resources used in, on and alongside the tracks. "There were some bugs, inconsistencies and failures. Well, sometimes, combat arms regulation has activated the night on the basis of a cap that did not exist. Was changed and the algorithm more reliable, "he says. > Extended to the border in 2015
Using counting loops in the pavement, combat arms magnetic sensors communicating wifi and variable message signs, the system combat arms goes back to real-time information with optical fiber that runs along the A31.
The purpose of the device is to regulate traffic combat arms before the formation of plugs. "Yes, it is a better traffic flow by increasing the flow paths that is sought. But we also expect a gain on the accident and profits for Envir