in the process of waiting for the red light, the overwhelming majority of the owners will choose "idle wait".
for an example of 2 cars, the values of PM2.5 and PM10 are 21.6 and 34.3, respectively, when the car is not fired.
when the car was fired, the PM2.5 and PM10 values rose to 160.5 and 256.5. In the process of waiting for the red light by the reporter Guo Yao
, will you wait or keep the vehicle idle? The reporters recently interviewed the majority of the owners who would choose "idle wait". However, the details ignored by the owners have increased road traffic pollution. Research shows that a large number of pollutants will be discharged at idle speed, so Beijing and other cities have put "parking over 3 minutes" into the legal regulations.
[environmental protection measures]
demand for "parking over 3 minutes". Beijing has entered law
regulations on the prevention and control of air pollution in Beijing for the first time, and it is the first time that "parking more than 3 minutes should be extinguished" into legislation and formally implemented in March 1, 2014. In schools, hotels, shopping malls, parks, office places, the community, the neighborhood of the hospital and the parking lot, the motor driver should extinguish the engine for more than 3 minutes without affecting the normal driving of the vehicle.
however, this provision is not mandatory, but is only a recommended clause in "promoting environmentally friendly driving", and there are no supporting penalties. According to public reports, although the Ordinance has been implemented for 1 and a half years, many drivers still do not know, parking more than 3 minutes, the initiative to extinguish the driver is very few.
at present, few cities in China have stipulated the "parking fire", but stopping at 3 minutes is actually a common practice in many countries and regions. For example, in a regulation that came into force in 2009 in New York, the "non - extinguishing stop" near public schools could not be more than 1 minutes, and there was no more than 3 minutes for "no stall" in other places. In Japan, if the parking does not stop, there must be a driver in the car. If not extinguished, the driver will be fined at least 6000 yen for more than 5 minutes.
in the regulations on the prevention and control of air pollution in the city of Ji'nan, there is no relevant regulations on "stopping fire". From the relevant departments, journalists have learned that the current prevention and control of motor vehicle exhaust pollution in Ji'nan is carried out in accordance with the regulations on the prevention and control of motor vehicle exhaust pollution in Shandong and the regulations for the prevention and control of motor vehicle exhaust pollution in Ji'nan. There is no demand for "parking and flameout".
harmful emissions: 37 idling vehicles = four thousand driving cars
Ji'nan environmental monitoring center station, United China ring academy, Nankai University and other scientific research units have made source analysis to Ji'nan city PM2.5, and found that the contribution of local pollution in Ji'nan to PM2.5 is 68% - 80%, of which 15% of the pollutants come from mobile Car. From 2013 to 2014, the number of motor vehicles in Ji'nan increased by 170 thousand.
"idle state of motor vehicles will increase the discharge of pollutants." Zhu Zhenming, a senior engineer at the Ji'nan environmental monitoring center, said that carbon monoxide (CO) and hydrocarbons (HC) emissions change at 15%-20% when the speed of motor vehicles is low, and the carbon monoxide (CO) increases more than 0.9 times when the motor vehicle runs at a lower speed or even at idle speed, and the hydrocarbons (HC) are increased. It will also increase by more than 0.55 times. Studies have shown that the harmful substances emitted by 37 idling vehicles are equivalent to the total amount of harmful substances emitted by 4000 vehicles running. "
" urban traffic vehicles discharge a large number of pollutants in the state of idle speed, so some cities advocate "parking over 3 minutes to extinguish" proposals, even legislative implementation. Zhu Zhenming said. According to a study in Beijing, if 1 million vehicles can be put on the road every day for 3 minutes to stall, they can at least reduce 1000 tons of pollutants. The study believes that if the parking lot is extinguished for more than 3 minutes in all parts of the country, the effect of reducing pollution and saving oil will be enormous.
[real problem]
is it necessary to extinguish the red light and other red lights? Experiment: the PM2.5 emission of the ignition is 2 times
a reporter has recently done several groups of experiments, and although the vehicle produces a lot of pollutants at the idle speed, the pollution produced at the moment of restarting is also not to be underestimated. Therefore, encourage owners to stall while waiting for a red light, which does not apply to short waiting times. One of the experiments is as follows:
October 29th afternoon, the air quality in Ji'nan is good. The reporter used a no-side micro handheld PM2.5 tester to test a car with a displacement of 2. When the instrument is stable, the PM2.5 is 21.6 micrograms / cubic meter, and the PM10 is 34.3 micrograms / cubic meter. Within 2 seconds after the start of the vehicle, the concentration of two pollutants rose to 134 micrograms per cubic meter and 187 micrograms per cubic meter respectively. After entering the idle state, the concentration of the two pollutants dropped to 50 micrograms per cubic meter or 80 micrograms per cubic meter respectively.
because of the influence of environmental wind speed, vehicle engine, oil and other factors, the emission concentration of the vehicle is not the same, but it can be seen that the pollutant concentration in the vehicle launching will be much higher than the idle state. However, the longer the idle time, the higher the accumulated pollutant concentration.
how long is the waiting time for a vehicle to flameout? A professional car forum says frequent flameout in a short time will also hurt the battery and the engine. If the red light is longer than 30 seconds or longer, the owner is advised to turn off the fire.
can Ji'nan stipulate a long red light "forced flameout"? Traffic police: advocating the driving habit, the supervision is difficult
the reporter observed at a number of crossroads in recent days. Most drivers are waiting for the signal lights, and there is no habit of taking the initiative to extinguish the fire. Most drivers choose to be long when the red light is uncertain. Choose the vehicle to wait at idle speed. On the motorway, there are few drivers waiting for a fire. "For example, the National Day freeway free, encountered accidents in front of the block, because I do not know when to walk, a lot of drivers are hanging on the air, rather than burning a bit more oil, and do not want to go out after the fire, be scrambled by other cars." Mr. Wang, the driver, said.
as of the end of June this year, the number of motor vehicles in Ji'nan has reached 1 million 638 thousand and 600, including 1 million 467 thousand and 900 vehicles and 999 thousand and 900 urban cars. If Ji'nan also stipulates the "parking fire", supervision becomes a difficult problem. A front line of the front line of the central section of the police believe that if it is "mandatory extinguishing", how to supervise is a difficult problem: so many parking, penalized one see, the other did not see the escape, the punishment will be dissatisfied. And the number of private cars in Ji'nan is increasing year by year. The traffic police patrol can supervise the place after all, and it is impossible to watch it for 24 hours.
"although there is no" mandatory fire extinguishing "policy in Ji'nan, we still need to advocate this environmentally friendly driving habit. The police said that this provision is more meaningful and is still a reminder to the vast majority of drivers that they can consciously do so by forcing the drivers to set a tight mantra and initiate self-discipline, thus forming a good driving atmosphere in the whole society, saving energy and reducing emission, making the environment better. This is probably the rule. The greatest practical significance of the platform.